It's your typical mobile game. Biggest complaint is that after Year 1, you can't complete a lesson or task even with your max energy. You get about halfway through a task, then you have to wait 2 hours for your energy to refill to finish the task. Incredibly annoying. 2nd biggest complaint is that it'll often reward you with energy that is more than the "max", and then it'll just take it away so you can't use it!