Its a very simple game in that its design is simple, and while i did enjoy it at first, i found i got more annoyed with it the more i played. If you play by playing the quests, those are locked out for an hour after you complete one, so you can only play 4 quests per hour (quests usually take around 30 seconds to a minute). This is very slow and takes a lot of fun out of the reward system. Speaking of which, the chests exist in this game but give you virtually nothing. Most of mine have given me 10 coins, and seeing as the standard enemy gives me 7, waiting 30 minutes for a chest that is a worse reward than 2 enemies is not worth it. Now, if you want to keep playing, theres endless mode, but this has the fatal flaw of taking nonstop damage once you take your first hit. Often times in a run i can avoid simple sections and not take damage in them. But if i make one mistake in a hard section, it will almost guaranteed bring down ALL 5 of my health bars down to nothing (ive stopped upgrading health cause at this point its useless if most traps are going to insta-kill me by knocking me back into other traps). Finally, endless mode contains two segments which are extremely hard, and if you make a slight mistake in them, youll still be alive, but you wont be able to get out, meaning youre stuck feeling helpless.
Tldr, its a very good idea, but the design/implementation needs work.
Fun for a day or two, no more