Fun concept, and can see it working wonderfully with proper execution, after the jam.

However there are still some things that would make it much better:

• Proper view of TD part, bottom lane isn't seen
• Some reaction to being attacked, other than red numbers
• More towers, as to give some strategic depth
• Fix wobbly camera, or just add First-Person view

All of these are because of lack of time, though, so great job on the game. An ambitious project for 3 days. You should keep going, it's a quite unique concept and has potential to be a lot of fun.