The game has a lot of character, from the art to the animations, to the particle effects.
The challenge is balanced, and I think that respawning quickly on the same "scene" was a correct design decision, as it feels fair while maintaining engagement with a nice challenge!
If I may, I would suggest reducing the size of the bullets effects, as they can quickly get cluttery (don't know if that is a webGL problem, but anyways it was nothing that hindered the gameplay).
Very great job, and I got all the 88 coins!