Tips snekagon

Use your big pieces to grow your snake, and small pieces to block your opponent's snake
Try to maximize number of turns where you grow your snake while blocking your opponent at the same time - you only have 7 turns, so squeeze as much as possible from each of them!
When building a snake, try to always have 2 options of where to continue - when opponent blocks one, you can continue with the other one
All the places around the body of opponents snake are reserved for you - opponent can never place tiles on those places. Plan ahead with this in mind
As second player, you have 1 piece fewer than your opponent. You can start with a big tile, but if both players manage to build a snake from all their pieces, the starting player wins. This pushes the second player to play a bit more offensively
The U piece is great for completely blocking one end of opponents snake, but can also be used to gain a lot of length in tight spaces.
The L piece is the most versatile piece with its 12 possible orientations. It is usually better to save it for later when you can use its flexibility the most
The 2-piece is great for connecting two snakes in tight spaces