This game is exactly what you would predict it is. Click a button, double or nothing. Personally not my cup of tea, but I am sure someone will find this game amusing.
The thief said something about a store, yet there is nothing different in the current tabs. However the little popup indicates i have money to buy something. Help
Chests are only guaranteed if there is a chest icon on the boss area on the mini-map in the top right corner. Otherwise, you only have a chance to get a chest the first time you beat a boss on a reset, if you have cleared them before.
Sorry for you, but it's probably that you disabled cookies or clear them on page reload or something. You can use the "Save to File" option if you want to be extra-safe.
We understand it's not for everybody, thanks for trying it out nonetheless!