The casino's cashier is where you can redeem the bonus code.
Deposit $30 with the code HAPPYLAKE01 and receive 28 free spins on Bananas Wild.
Deposit $20 with the code HAPPYLAKE02 and receive 23 free spins on Destiny Wild.
Deposit $40 with the code HAPPYLAKE04 and receive 60 free spins on Big Blue Fishing.
Deposit $20 with the code HAPPYLAKE06 and receive 35 free spins on Candy Cascade.
Have fun!