It's pretty fun! The music was very appropriate--it had this industrial feel and a driving rhythm, that went well with the fast-paced nature of the game.
It wasn't clear at first what the different colored screws meant, but I later found out in HowToPlay. Most players skip instructions, so perhaps some in-game onboarding would be helpful. Even something like showing numbers that fade in and rise up to give some quick info, e.g. "+1 speed" or "+1 luck".
I'm still not clear what the correct strategy is here since the screws seem head in random directions--there's no way for me to predict where the next screw will be aiming towards (or maybe there is a pattern that I haven't noticed yet).
I can see this being quite an addictive mobile game. What are your future plans for this project?
EDIT: Great to hear it's on Google Play--congrats!