It was originally supposed to support 2.3+, but due to timeline constraints I had to release it as 4.0+. I'll be looking into 2.3+ for a future release though!
I recall that sub-3.x Androids are about 40% of the market in Google Play, so yeah it's worth doing. (I'm sure there are many more low Androids out there that are simply used as phones and never touch the store)
Game looks great! I'm installing it remotely on my Nexus 7, but from the screenshots I was instantly reminded of Letterpress' visual design.
My intention was to inform the original poster that probably he could upgrade his device using CM10.
Coincidentally he happens to have the same phone as mine, wich i upgraded with CM10 and a custom kernel and it works (way) faster that the original 2.3.x with motoblur.