Soooo, you guys mean it's not easy to understand?
Should I add a quick tutorial menu at the beginning of the game including some images or GIFs (seems complicated but I'm sure there's a way, tough it could be laggy on a web game)
Yeah, I know the tutorial is really boring right now, it's one of the first things I'll be working on for the next update. I'm definitely making it easy to understand by adding some nice little animations, probably using GIFs.
I still have to figure out how to do it and how badly it could influence the game's performances, but it shouldn't be too hard.