I would advise a few things:
- At least one more carrot, for better duel suitability and FFA suitability.
- Some more very minor splashes of both color and interactivity in the eyecandy. Maybe a few moths, or something on those lines.
- Consider working with another designer to replace the AI generated clouds (and to fix the improper parallax scrolling).
This could be a new Garden Brawl for a new generation.