I had a difficult time trying to figure out what to do at first. WASD wasn't listed anywhere, so my first thought was that it was some sort of tower defense game before I realized I could move, and once I realized that, I was able to just kind of circle around the perimeter of the map and avoid being hit. I think this would benefit from some enemies having a higher speed than the player, as well as potentially some ranged enemy attacks for you to dodge