This site is not processing withdrawals, no surprise there.
Manual cashouts over 10x are not handled correctly. If a player manually cashes out at 10.5x, they will receive 0.5x resulting in a net loss. This problem does not seem to exist with the auto payout feature. I have not tested 3 or 4 digit multipliers.
The game leaks the server seed before the completion of the game. Normally I would discuss this problem with the owner of the site, but I do not think the owner of the site is acting in good faith. Some code follows to exploit this leaky server seed problem. It can run with a single account labeled account 2 in code, but will run better with two accounts.
I recalled there was an exploit on crash whereby those abusing it could view the multiplier of the round before it began.
So seems that it remains unpatched on whatever software this site is built on.