Oh those black strips with the coins indicate the amount of coins you need to break that strip. That's one of the ways I think it''s different from most drill games. (Rather than just mindlessly drilling down).
I have a few other ideas to add which included
- Power-Ups
- Story
- Checkpoints
- Enemies
- Art-style
But wanted to get the core game made which was:
A game where you must dig down and obtain coins to reach the next section while avoiding obstacles
Wanted to receive as much feedback from it as possible to see if this was something that interested people. That way I can decide to scrap it or continue