What I don't like about the game:
The main problem is that the enemies start shooting the instant they come into your view and a lot of times you can't see who is shooting you. This makes it very hard to avoid damage. And the damage builds up, I tried this game for a while but could only finish the 3rd room as by then my health is non-existent.
Also, the hitbox is a little too big and you can't fit in a tile wide space. other than that,
The game is really good
I love the simple retro style and the graphics with all those particles, It's simple and I like it.
And how can I forget the procedurally generated rooms, the animation that plays at the beginning makes it that much cooler.