I like this one, it's got that old school charm to it, and I'm a sucker for those retro style platformer games.
My main critique is the main character feels a little slow at times - and the spin mechanic for rolling around sits in an odd spot. I'd almost say to give the character personality, gut their normal walking, and have them spin everywhere - with the transition from idle to roll having a neat pop-in/pop-out effect for them diving into the roll state and back. Give them a bit of juice and it'll really hit home.
The gameplay is the collectathon standard, so I'm definitely gonna have to sit and play this game some. It handles well, the aesthetic is on point, and I can see this being the kind of thing to release in the late 90s/early 2000s.