This game is a classic with lots of fun puzzles to play. Unfortunately, the interface is not good. This map doesn't fit to the size of the screen--instead, it's small and hard to see. The arrow keys are equally tiny and don't work half the time. The swiping is the optimal way to move the bulldozer, but it will randomly start moving across the field for no apparent reason with no discernible way to stop it.
I love this game, but this app needs work. Please fix the control issues and make the window fit the screen.