The combination of mobile tower defense and resource gathering is a really fun and unique idea! I can see how constantly holding the space bar might become a bit tiresome, so maybe a toggle option could make things more comfortable. The game starts off engaging, but it does get a bit repetitive after a while, so adding more variety or background music could help keep the momentum going. Considering it was made in just two days, the result is really impressive! With some polish and a few more features, this could be a standout game. Great job, and thanks for sharing it with us!