Just checked your site out which seemed way too simple and stale. A better theme with more UI elements could have helped if you ask me. Furthermore, PVP gambling sites rarely do well op.
0% house edge is tempting, but that is nowhere near enough to attract plenty of gamblers. Your site needs to offer something more appealing to draw in gamblers in droves op.
Bustabit is very simple too but they have lots of players. The more products you have on website, the better but since their niche is only lottery, I think that it doesn't look bad. The design is simple but it follows modern UI/UX standards, it's also responsive and has dark/light themes. Btw I also think that it will be hard for them to attract customers because there isn't a big demand on such casino products. There have been some expensive attempts a few years ago and all of them failed but I still wish all the luck to the owner.
There is another code for 0.1$ bonus that they published on their tiktok, the promo code is: TIKTOK