Before I comment, I have to point out that I am not a fan of Sonic at all. Never liked them, and this clearly takes influence from Sonic. Now that that's out of the way, here's my feedback:
- I think there are too many systems. The initial impression of a bear on an ATV is great. Funny, catchy, interesting. But it's making a certain promise: a big fierce bear on a trucking ATV rampaging through the forest. But now I start playing, and I have all these weird systems. Eating, calories, platforms, hitting control on metal things, and so on. Come on! I'm a bear on a fucking ATV! It's too fiddly.
- The actual movement on the atv feels good.
- It is simply insulting that a bear on an ATV get hurt by running into deer and birds and crap. Come on!!!! I'm a fucking bear on an ATV!!! I should be TRYING to run into every bird, deer, and whatever I can. I would remove the "space to attack" altogether, and just make him automatically attack anything he touches. That sounds way more fun.
- It has the same problem as sonic. It promises that you "gotta go fast" then punishes you horribly for going fast. There is so much fiddly stuff everywhere causing me to crash and get hurt, then I have to stop and eat berries from a bush. Focus on the core experience here, and make sure everything is supporting it. Because right now it feels like everything is working against it.
- The speed feels too binary. I'm either stopped or puttering along. Consider having an initial quick phase of acceleration, followed by a long tail. That gives you an incentive to keep moving and building up speed, not stopping every 5 seconds.
- I don't think the system where you have to press ctrl to interact with the "boost" things and the "springs" is good. Why don't they just automatically activate every time I touch them? Right now it's just punishing and lame every time I miss one.
To sum up, I think you have a fundamentally fun system of controlling the bear on the ATV. But there are so many other systems built up around that that conflict with it. Don't try and make the game into something it's not, make it the best version of what it actually is. Really hope my feedback isn't too harsh, I just see a path to a good game, and want you to take it. Good luck.