Pretty simple, perhaps too simple, yet entertaining game. There are plenty things that it has to improve it, like, for example having more difficulty (by making to generate more square enemies around the area), or having a more colorful, alive and spacious background... but asides from that, the game itself it's just okay for me. I hope that this comment/constructive criticism helps you to continue working hard and improving into making your future games/projects in general. Much encouragement for you, my guy.