I thought that this game was really well done! It is beautifully simple, and was very enjoyable to play. I was genuinely invested in this tiny puzzle game that was at times harder than it looked.
The one thing I struggled with was the responsiveness of the jump button, but that has been addressed by both players and creators, so I won't go into detail about that. Besides the finicky jumping, I found 2 minor problems, neither game breaking. First, the triangular part of the bullet has no collision so lasers go through them.
The other one has no effect on the game, it's just if the character hits the side of a platform, and continues to hold the direction of the platform (ex: you jump into the top left corner of a platform and continue to hold right), the character just never falls. They stay stuck to the side of the wall until the arrow key is released. Very minor bug that doesn't affect gameplay at all, but I thought I'd let it out there.
It was a joy to play, and I look forward to seeing what is done from here on. Best Wishes!