Mahjong Tower 2 is a puzzle game in which you play different variations of the solitaire version of mahjong. You are able to choose from different layouts, and the challenge and strategy for each are a little different, even if they all have the exact same rules.
Your main goal is to clear the board of all the tiles on screen. You have to do this by pairing each tile with another tile with the same symbol. There are some restrictions though: you can't pair a tile if one of the two tiles doesn't have a free edge (either the right or left), or if it's under another tile. You can also click/tap the "How to Play" button on the start screen to find out more.
Web browser (desktop and mobile)
Click/tap one tile to highlight it, then click/tap the next tile you'd like to pair it with. If the 2nd tile does not have the same symbol as the first, the 2nd tile will be highlighted instead.