If making this project again there are several things we might try differently:
- Design a uniform end return that would slow and redirect the coin cell at the end of each ramp. The end return being used now is a bit of a hack
- Catch the coin at the bottom and have it do something instead of just roll out (e.g. light and hold the top LED)
- Look at adding a motorized coin cell return to the top of the tree
- Consider other features - like nails used similar to a Pachinko machine or a display to count trips
Credit to Adrian for the idea of a rolling coin cell. In fact, credit to Adrian for all the real thinking....