Really fun game! I like that there's a variety of power ups, enemies, and levels. The design is similar to Super Crate Box but the addition of needing to defend your spaceship makes for interesting gameplay where you're rapidly switching between defending and pushing for the next power cell. It took me a while to realise I needed to touch the ship to escape once I had enough power. Sometimes it felt like there was a slight delay before the player's appearance changed to reflect the power up they gained. The music is bangin' (especially level 3) and it's great that each level has high scores for time and cells collected. Awesome work!