I've been playing with CorsixTH on my N900 (its in Apt! I'm very impressed!)
It runs really well; apart from the music, but I understand that's because of MIDI and there is MP3 support iirc?
Anyway, my question/suggestion is a way to rotate items without needing right click. I haven't found a way of doing it myself, maybe there's a shortcut key I've missed?
I'd also like to suggest bigger text/buttons, but it's of no urgency
Building stuff is a bit frustrating when unable to rotate though.
I honestly can't fault it so far, it's really progressing at an amazing pace, and I'm finding it very playable!