Thank you for your feedback! Yeah we accidentally set the players keys so that they can buy all colors and didn't have the time to change it..
If we keep working on the game we definitely want more hazards / enemies, falling traps are also a great idea, thank you :). Originally the idea was that most of the challenge comes from playing against other people and being the first to get the key to the door but as the multiplayer was not getting done fast enough (or atleast not stable) we added the singleplayer mode.
I'm sad to hear that the multiplayer didn't work :/ While testing we had quite a few bugs especially in the multiplayer but we were able to play together .. We didn't have the time to test it in webGl though, so that might have been the problem somehow ^^.