Awesome game :D
Here's some feedback to keep you busy :)
The jump is very floaty, and could use some greater gravity, especially in the second half of the jump.
At the moment, the jump is just a less precise version of the dash upward, think of some way to buff it or nerf the dash. Also, the jump should happen when the jump button is pressed, not released.
The player shouldn't start in the middle of the screen, but rather a little to the left, since they want to see more of what is coming, rather than what is behind them.
It feels like the shuriken should shrink or do some other effect when it runs out of time instead of just disappearing
Also after dying, I got into a state where I started the game with all the powerups active at once. Not sure how I got that, but I am able to consistently smuggle one powerup past the death barrier
Love that activating the powerup is via jump jump dash, works great with the title, although sometimes it seems to not trigger the first time after collecting a powerup
Very hard to move left and right while on the floor, which is something I often want to do when I am too close to the right side of the screen, or when a heat-seeking missile is coming from above. Maybe have the camera adjust once you land?
Can't wait to see this on the google play store :D