Found this to be relaxing to play =]
IMO you dont need to add shooting, the focus on dodging and collecting is simple and fun.
- Change the initial spawn bounds of the "enemy" circles so that you don't auto-lose at the beginning. Maybe Try having things spawn closer to the edges.
- Randomize initial directions
Some more ideas:
- Changable settings: ability for player to add their own words, adjust number of enemies, size of map, decide if order matters or not, etc.
Overall, I liked the simplicity of the game. It was frustrating at first (in a good way) but is really fun when you have "close-calls" and have to dodge. :D