It does smell of scam js, your link to the site is a referral link, the site looks like a 12yr draw it. Best part is you go on the bottom "This service is still BETA. Use at your own risk." You might as just say when I get enough bitcoins I will run away. Also if I give 1.20 btc I get 10% bonus, if I give 2.5btc I get 10%. I would think if I am giving more my bonus should be more but it isn't. It looks very scammy.
I dedicated my time to the logic, I can improove graphics with time, the most important thing is that the site works correctly.
Probably if I wanted to take bitcoins and run away I would have cared only at the looks.
Bonus is 5%, 10% if joining through referral and it will increase proportionally depending on how much your referrals will deposit. Maybe I should explain this better in the FAQ.
The site is still BETA because it has still little testing. Anyway I am making hourly database dumps and backups so if something goes wrong I might fix it.
And "use at your own risk" because it's my first application that involves bitcoin. Although I am quite experienced with coding, and the whole system sits behind a restrictive firewall, I never ran this kind of application before. Even MTGOX has been hacked someway. If you don't trust it enough but you want to see how it works, you can partecipate with a little amount and see it by yourself. When you are confident that things run as expected, you can always deposit a bigger amount.