Really nice job with this! I love the concept and the aesthetic. Little bits of feedback on things like fighter health, tower damage, or +/- values to money would take this a long way (as it is, I had trouble tracking what was going on onscreen). But I'll repeat what others have said - This feels like a week of work to get such a polished demo, and getting it done in a weekend is an incredible accomplishment. I feel like it could become a small indie title if you chose to expand on it :)