I played your game for a little bit and had fun while playing and I think you have some nice graphics too!
Some remarks:
- Volume sliders don't work
- No audio ingame, I would add sound effects and some background music (probably something intense)
- Something so the ducks on the rocks atleast respawn. After the third stage I couldn't fight all the monsters because I ran out of ducks.
- The movement was fun in a way, but I would change the slide a bit. Instead of the long slow end I would just cut it off. Also in the air I could fly quite a bit if I was sprinting.
- The camera was a bit off or the colliders of your rocks. I could run up to them and see through them. If your camera is infront of your player then it will go through a wall since the collider starts at the player. It could also be your rocks don't have the right collider on them.
I really think it will be a great game, but I would look at some of the remarks.