not my type of games, i don't like touchscreen key games... but i could help you for a german translation if you want one. just ask per pm for translations. (mostly google translate will do but not everywhere)
problems/bugs i found in few minutes:
1. buttons sometimes don't react when lagging.
2. changing settings during the race doesn't get saved -> after restart setting reset
3. after a click on "show final results" bots don't get points any more, they finish with 0 although last place would give 3. human cheating, eh? also i noticed that the blue car was called "Mr. Yellow" then, is that supposed to be?
4. and last but not least: no pad support
(for mobile phones like sony xperia play)
doesn't need analogue input, would not be fair for fastest laptimes but maybe the arrow keys for steering and x/o for throttle and break?