That's the kind of idea that would perfectly fit in the mobile game market! Definitely an expandable idea. I can totally see it working with leaderboards, a timer, upgrades and challenges!
Thank you! I'll try to have those things in mind when moving forward with the game. Maybe I'm able to add some more things. Timer and leaderboard are on the top of my list. :')
I've now finally came around to add a timer as you suggested and you can now also upload your time to an online leaderboard. Definitely improves the overall experience. :')