ehhh
This game doesnt seem tested. It's very difficult very early on, which kills any fun factor it may have. The upgrades are too expensive early on. Adding a sword eliminates your lazer ability, that really sucked. The shields bouncing your attacks back was a terrible idea, especially for just the second level.
Balance some numbers like damage, health, and money, and it'll be a very playable, very creative game. Good start, but keep going.