I really liked the sound effects. Some simple background music would've been great!
The jumping felt a bit floating to me, but it wasn't that bad either.
The laser robots get into action very fast, which is nice and took me quite by surprise with the first one 😂! Also really liked the bosses!
Damage indication on the bosses could help to make a bit clearer whats happening (like sound effects, modulate sprite to red shortly or even a health bar).
All in all a solid and well rounded entry. Great job!