Thank you very much for the constructive feedback!
I really wanted to do more with the enemies. That would have been the focus of the theme. However, I was ill prepared to take on that task. Only a day before the challenge started did I finish the 2D tutorial on the Godot website :p
I will continue working on this game for a while until I feel like I achieved what I set out to do.
Thanks again for the kind words. They have given me a few new ideas :)
p.s. This game would not have been as fun without the art that my friend provided. It made for good ambiance ;)