This game is wonderful! I can't wait to see the full version of it.
Here are some opinions:
- For the First Boss who generates lazer I noticed that it always rotates clockwise, maybe you can make it rotate to the closest side at you.
- That same lazer rotates too fast and makes it unpredictable, maybe you can make the boss do like a loop to the side that is going to rotate with the warning, and then do the lazer movement, or make it start rotating while it's warning you that it's preparing the lazer.
- With the enemies that shoot projectiles, you could add some animation before shooting, that way you give players time to react, it's not really funny to kill the enemie right after it shoots and die because of it (I died like 4 times because of it).
- I think you should lower the opacity of the player's bullets, that way you can focus more on the enemie bullets, sure it's a mess when you have lots of notes and die because you couldn't see the enemie's bullet, not really necessary but if you want to be fair with that, it's your choice
- For the Second Boss, when it disappears maybe you could make the boss still can be seeing but almost like if you couldn't, lower the opacity but not at 0, but around 0.1 maybe (considering that 1 is full visible), would be a good effect, also for some enemies that also do this, not only the boss.
- I think you should make the bullets behave different or have a unique effects when the sound of the note is different, it doesn't need to be a big change, maybe like, change the shape of the bullet, or make it last longer just a bit, etc.
- Would be good if you added a death animation, even if it's just a simple explotion.