Instant action and quite fun !
I really digged this one, i love the very retro style and the enemy icons designs, gameplay wise everything is nice and responsive, the upgrade system is also pretty cool, and i like how you’ve let players buy multiple tiers at once since the only limit is the price and not “1 upgrade per level end” like in many rogue likes.
The tune is incredible as well and really hypes you up for the insanity that comes especially on the harder levels.
I’m just a bit on the fence about the CRT filter, while i think it looks great and really adds to the character of the game, sometimes in the shop where there’s smaller text it makes it a bit hard to read i.m.o
So i don’t think you should get rid of it, but the readability of text could be a problem :/
Other than that Great entry ! ^^