Thanks so much!! In general I agree with your comments :-)
Controls will change, I forgot to add the Command List and I guess I frustrated a lot of people. Hopefully not very much :-) But I will add support for controllers and a better map for keyboard/mouse.
About the animations, yes, they are a little bit slow, but that's because in the first levels your aggressiveness is low, once you start upgrading your character the animations' speed will increase.
The ground will fall, I'm working on this mechanic now. I changed the whole procedural generation and I had to come up with a solution because now you can get stuck in areas where the ground felt after you.
UI is super basic, I didn't add any effects, sounds or anything yet... UI is always super tedious hehehehe...
Thanks so much for playing the demo and taking the time to share your thoughts! Very helpful :-)