I like the idea, but it's unbalanced. The enemies are too fast and heal you too much. The shooting felt good, but as I kept playing, I found it to be a near pointless exercise, because the enemies re-spawn so quickly. It was just easier to run away from them. The healing projectiles also feel unfair as they move so quickly and I don't have enough time to react. I like the presentation though: the little jellyfish character, the healing bots and their animations look cool and the intro sets the tone for the game nicely, even if it is unskippable (a little annoying). You could definitely take this idea further!