Yes, more units would be nice. At the beginning, I wanted to have 3 unit types. However, I was not able to do that in time! I'm working on a post-jam version, though. Thanks.
The game plays smoothly. I like that it has sound. It would be nice if you could restart. I think I am "stuck" in the red level. Can you add the controls in the description? It took me a while to figure out that I can push ^^.