Enjoyable slime collection game.
Gura's sprite is cute and the animation well done.
Nice arrangement of Q as the BGM!
The part I enjoyed the most was boosting Gura out of the water and doing some flips. XD
Some improvement suggestions:
-There didn't seem to be a motivation to defeat the enemy fish. Maybe they should give some rewards or hinder the player from reaching the goal, making the player want to get rid of them asap.
-Speaking of goal, there doesn't seem to be one in the game or it's not made obvious. A game over screen after collecting all slime and defeating all enemies would be a nice way to give the game an end.
Good work!