Another freebitco.in wanna be site with much more new games, but the house edge for the hi-lo games is still high. It my math is not that bad, the house edge is 5% like freebitco.in . Maybe you should consider to reduce it like normal hi-lo/dice game.
You should check out some of our other games Bitinity, all have different edges and I'm sure there's something there for everyone.