Hey! Thanks so much for such detailed feedback. I'm super new to game development so it means a lot to have people playing my game and finding it fun! And well done on getting to the boss. ;)
Will definitely take the point about controls on board! I think I designed this largely solo without showing other people too often, so I found it hard to judge how much I should explain. I'll take a lot more care and testing over this next time.
Accessibility I knew was always going to be an issue - all the gameplay is based around colour mixing, and the technique I used for that was going to be difficult to adjust to other colours for people with visual differences. I really wish I'd put more thought into this one, though - I'm sure there would have been ways around it. I'll have to make my next game extra accessible to make up for this one! :P
Super glad you found the difficulty curve successful - I put a lot of time into designing the levels to work in a way that didn't feel unfair. I would have liked to put in an endless mode with random spawns, but every time I tried this it immediately felt like the game was cheap-shotting you. Really happy that this element of the design was appreciated! :)
Thankyou so much for playing and good luck with all your projects!