I played through the demo and explored as much as I could, and I gotta say, this game is very promising! I'm a big fan of the mouse main character, but beyond that, the gameplay is very fluid and the map is fun to explore. The roll was especially fun to mess around with. Even after the demo ended, I went back to see how quickly I could move through the map now that I knew my way around, and it was very satisfying.
My main issue is the lack of characters to interact with and the lack of any solid worldbuilding. It just felt kinda...lonely. And not in the spooky mysterious way, just in the "I feel like I should've seen someone by now" way. The game looks very cute, and having an interesting world to attach to would make it feel far more immersive and all the more fun to move through. (Though, I assume that's something that has been excluded from the demo but will be in the full game.)
In terms of presentation, the visuals were cute and intriguing, the music was cutesy but mildly lackluster, and the sound design is nice. And again, I'm a big fan of Tofu the mouse.
Also, just a tiny suggestion, but I think it'd be slightly more convenient for new players if the tutorials for the basic mechanics weren't tied to interacting with signs. Hollow Knight (I've done my best not to compare the two game up till now, I'm sorry) does it quite well, where at the beginning of the game, it shows you prompts for the basic controls without interrupting the gameplay.
Anyways, awesome game, I'll be looking forward to the full release!