So now that you already know how to make chains, the question is, how do you win the game?
We should look at the right border of the board. It's pretty obvious.
Score: How many points you made during this game. The more tiles you clear in one chain, the more points you get.
Level: What level are you on in the current game. Levels are not infinite, nor are they very many. Around 5 on hard.
Chain Length: How many tiles are selected / How many tiles need to be selected to complete a chain.
Chains Done: How many chains have been completed of the desired size / How many chains need to be completed to pass this level.
Ticket Pool: How many Tickets you would win if you finish the current level. It's cumulative, more levels completed, higher payout.
Fire Tiles
If you do not select a chain of the correct length it will not be counted towards the chain done and as punishment a fire tile will appear. This tile "burns" the tile below it (blinking in red) every round that you play that you don't use the fire tile in a chain. Don't try to include it in a chain that contains only itself. Two fire tiles will appear to haunt you. If you include it in a chain that isn't large enough it will be substituted by another fire tile (but you may need to do that to avoid losing the game). But there is a bright side: It's worth more points than you're regular tile. If a fire tile reaches the bottom of the board it's game over.
Rock Tiles
They are not going anywhere. You'll have to work around them. Unless you burn them. Then they go away. (Thanks Harakeke!)