Happy to see a new aspiring Godot dev! :D
Please keep in mind that my feedback is mostly technical stuff. You did great for a first game :D
I love that you already managed to implement so many things in your first game! (I sure as heck didn't T.T)
- So regarding your games mechanic:
I like your theme interpretation of the "waves" being shockwaves.
It's a bit difficult to use though. I actually had to stop playing because I got softlocked in level 3 (apparently you can only use the mechanic while being on ground)
Also everything freezes when I use the ability. Like, I can't even change my movement. I just have to endure the tween before I can do any new inputs D: - I liked the idea of stuff breaking. It was very fun to see all the bits flying around!
- I didn't like the implementation of the poisonous floor, because it was so far at the end of the level. Everytime I failed I had to do the entire level again :(
There was also no warning about the floor so at first I didn't really understood what was killing me D: - I liked that you had HP bars. I was just confused about the amounts. The enemies had so many HP :O
It felt as if I had to stomp a Goomba five times :(
With all those technical things out of the way:
Very strong first entry! Keep going! We will watch your career with great interest ;)
If you are interested in learning more about Godot I can recommend you a few channels that I used to learn more about the Engine and Game Design in general (or you can check out my games. They are almost all made in Godot ;))