The UI seemed broken for me. So I had to randomly stumble upon the controls, I saw your instructions later. Restart also was automatic so I did not even know that gameplay was looping.
Also I think each element should use bigger scaling because I could barely see the heroes until I did a full screen
Its a nice Prototype and what it would need is simply some feel good elements and better UX to feel better.
Congrats on creating this in 2days