Nice game!
I loved the little mouse character, the design is very cute and it's well animated. So are the enemies. I liked the whole thread-and-needle aesthetic that runs through the game.
I had a bit more trouble with the environment as I just wasn't always sure at the beginning what was solid and what I would be going through. I was a bit lost at times and I think a map would have really helped. There was a switch and a nice shortcut at some point, which I appreciate.
I also really appreciated the extensive tutorialization, which is always nice for a jam game.
The thread-and-needle was so nice it did overshadow the dash to the point I forgot I had it. I only remembered it near the end, but I like how you can chain the two moves. I loved that I could grab enemies into spikes!
But I did have a few frustrations with the combat. I felt the reach of the needle to be too short. I was often trading blows with enemies, unsure how to avoid damage. I also think the pogo would feel better and be more useful it if launched you just a bit higher in the air.
It took me most of the game to understand the red gauge and the bottle sound effect you hear sometimes. I think it restores one HP, but I'm still not really sure...? I also suspect the additional red thingies were "Piece of Hearts", but I only found two so I could never confirm that.
The boss fight at the end of the game was very well done. It had interesting moves and clear telegraphed attacks. After a while I could avoid them and then grapple myself toward it for a few punishing hits, which is a very satisfying thing to do. But it went on too long and overstayed its welcome a bit.
On a similar note, the gamepad controls were also a bit strenuous for me, with the jump on A and the grapple on Y. I did most of the platforming with an uncomfortable "claw" grip.
But overall it was pretty fun! If it's a demo, the full game has a lot of potential ;)