Absolutely love the character's (Mixuruca??) design. It's a perfect mix of ugly and cute. Is there lore behind the character or world? Do they have a goal or reason to run through the strange brain realm? If you think it fits your vision I'd love to see some characterization and story beats.
Also love the gnarly look of Cerebrum. It's slightly nauseating but awesome and creepy and I like just standing still to admire it. Being familiar with Sonic games I found the game pretty easy to adapt to which is nice because I am not the best at platforming.
My only issue is that maybe some more health pick ups would be nice as I struggled a bit. But might just be a skill issue lol but it seems like sometimes the traps like the guillotine blades move very fast and hard to predict. Also it might be nice to have the ability to grip ledges. I feel like I had multiple instances where the character just slides down and falls into the abyss. Also in the pit area where it gives you the second I think hint bubble, maybe swap it with the hint that tells you about bouncing? I feel into the pit I could not figure out how to get out at first lol
First impression overall is pretty positive. Would deifnitely love to see more!