Thanks so much for your kind words! I really needed that. I'm having trouble keeping up motivation since there seems to be little interest in my game :)
About the game speed; I notice that making it faster makes it more reflex-oriented, while making it slower makes it more tactics-oriented. I prefer the latter, though I understand that's a personal thing. I will consider a game speed slider for this.
The curve ball idea is a good one!
Radar/zoom good ideas, though I may add it later (I really want to release ASAP, this project is starting to drag on a bit)
Side selection, good point!