Hey really fun game!
The design so far from what I saw was great. I'm terrible at your game apparently and could only get to the 2nd boss on 1/10 tries ha. I love randomness of the levels, you have a good depth of enemies from what I saw and every little section was challenging.
I'd say add a level selector, but that's only because I sucked at your game and wanted to see more hah. I'll give it another shot soon!
Great job :)