This one is tough!
I like the look of the game, its simple but it obviously well done with a font that matches the pixel art and lovely colors. Same for the 8-bit sounds, simple, but fitting.
The floating movement was difficult, and I guess the crux of the game! A bit embarrassed to admit my highschore after quite a few efforts was 11.
The shooting is even harder than the movement! lol because your bullet is so smol u need perfect aim. I think the bullet could afford to be bigger x3? I ended up just jumping around.
Overall though... cute game, If i could add one thing Id have the heart character have different facial expressions for when he does stufff.