Nice game! Levels had appropriate challenge, but because one couldn't die the game flow was not interrupted even when being hit multiple times. Visuals were great, I especially liked the boss planets. Music and sound effect were good too. Overall enjoyable experience.
One thing you might want to consider if continuing to develop the game, is to add some indicators when the player has been hit. Now for example the lasers went trough the player so the first time I was hit, I though I just barely avoided the laser and noticed only later that I was losing points. Perhaps destroying the laser objects when they hit player would make it visually more clear that the laser actually hit the player. Maybe also make the sound sound effect clearer/louder.