The game concept & graphic is good. BUT 1. Too dark/small to see some clues 2. EXPENSIVE or u will take ages to win. U need energy for EVERY move. 1st few levels r ok, each move take 1e. At abt Level 10 each move take 5e or more BUT yr way of earning energy din increase in that ratio. Even u pay US5, it buy u 1500e which can't complete a level. If u choose to wait, yr max storage is so limited that the full bar (abt 100e) u can take less than 20 move. This is super annoying.