The shield powerup icon needs its shadow adjusted to be in line with the others.

• Shield fades in
• Shield fades out
• Shield prevents the ball from bouncing off the bottom
• Shield has a display on the side for how long it has yet to remain
• Sound effect for bouncing?
• Sound effect on fade in?
• Sound effect on fade out?

Right now there is a single level that covers all the currently defined brick types, plus the full/half positions. It's not every exciting.

There's also no way to actually trigger getting to the next level from it! But it should be pretty easy to fire off something (perhaps on a brick's destruction) to check the brick container if there are any destructible bricks left and bump the level if that's the case.

When the game begins, we should have a neat logo that sits atop the settings menu (which will help differentiate from Arkanoid!)

Ability to have a ball that doesn't bounce but just powers on through bricks for a short while.

• Implement basic powerup
• Add sound effects?
• It currently goes through gold bricks, do we want that?
• Add particle effect to super ball?

We could add more brick colours (perhaps either detach the points value from them except for silver bricks), either with dedicated sprites or creating clones of existing ones and modulating the colour on the texture.

There is currently no actual detection for the ball leaving the playfield, nor for the player's lives.

Moreover there is no capacity for a game over when all the player's lives are spent.

Now the player actually respects physics, the static body collider for the shield powerup forces the player upwards until they are no longer overlapping.

Solution: move shield to its own layer, have the ball collision mask that layer as well and the player not match that layer.

Ability to collect a skip level powerup, it should credit you for either all the bricks outstanding, or a single clump of points. Probably should be rarer than the other powerups.

Not consistently reproducible, but:

• only observed when shield is active
• typically with multiball (9+ balls current)
• on breaking the last brick or second to last brick, it just crashes with no debug output

Currently the ball bounces off the bat based on its collision normals, where the collision shape is actually mapped reasonably approximately to the bat shape (including the little edges between the top of the pad and the side edges)

The common accepted practice is to have the return angle be determined by how far from centre the bounce position is; if the bounce is near the middle, the bounce should return near-vertical, with the edges being a more slanted angle, to give the player some control.

I think it might also be interesting to experiment with variability based on player momentum in the frame where the bounce is evaluated (or perhaps an effect of the movement across last frame and this frame) to produce a short of 'chip shot' effect, where the bounce is more controlled if you're not moving, but if you're rapidly moving as you slide the bat in place, it produces a distorted angle.

Not clear if this should be on its own, in addition to or overruled by the more discrete control method.

The mouse controls tend to drift to the right in the web version.

Right now there is no visual indicator on the metal bricks - there is the audio cue (similar to Arkanoid) where they ding with a different noise when the collision isn't going to break them (but the silver ones get the usual effect when they do break)

But there's no visual cue. Arkanoid flashes the edges of metal bricks on level start / player restart, other variants have texture on the bricks (so they're not flat bricks), but I'm not sure what I want to do here. It might be interesting to be able to define an animation on them.

Player should be able to collect extra lives.

• Players can get extra lives every 500 points - is this the wrong amount of points?
• Extra life pickup

If the player catches the ball on the underside of the bat, the ball will still bounce, but of course this won't save the player from losing that ball.

Should the underside not be collidable?

Additionally, the edges that stick out from the pad area are mapped in the CollisionShape, so it's possible to produce an effect where the ball can come in at a steep angle, bounce off the edge of the upper pad area, then hit the corner of the bottom of the pad and bounce off at a weird angle. It's also very weird if the player is hard up against an edge and the ball is bouncing in that corner.

Perhaps widen the top of the bat so the 'lit surface' takes the whole area, or bring in the underside edges?

Need to update the Godot project plus all the core icons to have a game icon rather than the Godot robot logo.

• Are powerups dropped frequently/infrequently enough?
• Different powerups should have different drop rates?
• Don't drop slowdown if ball below a certain threshold?
• Superball lasts 45 seconds, is this right?
• Shield lasts 30 seconds, is this right?
• Ball max speed could be raised?

The default binding for the in-game options menu is Esc, but this is prioritised by the browser needing to release mouse control, so add an extra keybind (space?)

• Deploy to Itch.io
• Hide irrelevant settings - scaling
• Tweak mouse sensitivity (see related issue)
• Hide exit button on main menu
• Optimise web build

A powerup that slows the ball down to a given speed.

I'm not clear yet whether this should slow it down to a percentage of current speed (easy) or to calculate the x/y relative to a given target velocity, e.g. if we're travelling at [30, 30] our velocity is 42.42, but of course that assumes a 45 degree angle; travelling at a steeper angle will adjust these.

In true Arkanoid fashion it should be possible to get a weapon attached to the bat so the player has active abilities to take on the level without just bouncing the ball (while not losing it, either!)

Classic Arkanoid does this with making the base into a mobile laser base but this could easily be something different, perhaps time based somehow with targeting rockets? TBC.

Need a settings menu.

• Volume control
• Mouse sensitivity control?
• Maybe resolution multiplier control?
• Quit game

A powerup that splits any active balls on the playfield into 3 (so, splitting off each ball at an angle of 15 degrees either way) and ideally preserving the current velocity in so doing.

• Current angle of variance for the two new balls is 10 degrees from the origin ball's current trajectory. Maybe try other values such as 15 degrees?
• Does this need a one-shot sound effect when collected?
• If the 2-way sprite from Sinistar/Iron Plague can be saved from corruption, have a 2-way split as well as a 3-way split?

The bricks remaining counter clearly says 0 (with only non-destructible bricks remaining, or in some cases, no bricks remaining at all) but the detector doesn't move the stage on.

Has only been observed with superball.