Impressive for just 3 hours. If you are looking to improve it, it needs two things, maybe three:
- Fairer enemy generation (so that if you're right at an edge, an unavoidable enemy doesn't spawn right next to you)
- Slowly auto-heal over time to really turn it into a marathon game
- A very gradually expanding map, so if you're very deep into a run, the map has zoomed out to be so large that you're basically a pixel among an ocean of enemies lol. That would be crazy!