Hey! Great game. You really need to add a level counter though because I have no idea how far I got, but at some point the bosses became easier to do than the rooms, and then a little after that the enemies stopped getting harder.
I'm just gonna rattle off some points here:
The frames and audio die a little when you have turret and barrage at the same time.
There's a small issue with enemies phasing into walls and getting stuck inside them, but you really have to try to make it happen.
Sometimes the first attack from the bug boss carries over into the second attack where you have to stand still in a safe spot, making it impossible to dodge.
Boss health bars.
On the third stage, I'd appreciate the snipers having just a tad bit more charge time before shooting, especially when you first walk into the room.
Being able to move the position of the special ability (turret, riot shield, synchronicity, etc.) would be nice.
Might I suggest that after filling up all the sequencer slots, or after getting some amount of extra note blocks, that the player has the choice to 'restart' but with 5 rows on the sequencer instead of 4? Or perhaps the player will be able to equip 2 abilities.
The melee attack that the eye boss does is pretty cool, but I rarely see it happen, and it only lunges once.
Don't know if this is intended, but you can shoot the turrets past the barrier on the eye boss and into the eye to damage it right from the beginning.
A few invincibility frames would be nice after a dodge, would be a bit more forgiving with the laser on the eye.
I've gotten the gold portal to open a couple times, but still haven't figured out what the trigger for that is, if there is one. Very nice surprise though, blew my mind the first time where I managed to walk through something like 8 rooms before being kicked out.
The little tune that starts at the beginning of a boss fight is really cool, and it would be great to see that being extended more so there's some sort of counterpoint happening between the boss and the player.
The bug boss is disproportionately harder than the eye boss because the eye boss doesn't move nearly as much. On several attacks like the x4 lasers or the bullets that follow you, I'm able to just circle around one open point of the boss' barrier and meatshot it. With the right items, it can take about 10 seconds to beat that boss.
Anyways! It's really fun and I sat here spending probably the last hour and a half on that run. Can't wait to see how it develops!