I love the game. It's simple and addictive. I might suggest implementing a way to control the speed at which the spawner moves. Like a slide bar on the side or something.
Looks like it could be fun - But as a rule, any game that requires "energy" to do things, I quickly drop. Make your money in a less annoying way please... This isn't facebook.
That's something that'd likely show up in PlinkyPlinky II: Plink Harder. Glad you enjoyed it!