For the next release I'm looking to add joystick controls and changing the level progress. The gameplay is a little slow and levels take around 5 minute, making 10 levels too long. This is my thought:
- keep level 1 the same with trees and cows, keep 10% tree spawn and 30% cow move
- level 2 introduces rocks, so let's add a chance for meteors, use 10% event chance
- level 3 add abductions, increase event chance to 20%
- level 4 add alien invasion (adds cows without abduction) chance, use 30% event chance
- level 5 use 40% event chance
I think this will be a good starting point, will cut game time in half, and add action much sooner.