Interesting idea! I suspect there are lots of hidden pathways to discover with the fake red gems! I liked the way the instructions were laid out. Very clear.
My suggestions are:
- I wish you could close the help with WSAD and not need to use the mouse every time
- Pressing H to open help after first level would have been useful!
- It could have been easier to understand if each type of gem was introduced 1 by 1 each level, so you could learn them as you go rather than trying to digest everything at once
Great work, best of luck