i prefer skilled base games where winning is depending on skill, not only luck, such as dice or high-low.
add some arcade style games and pvp games, will be more funny.
good luck in your work
i second this, i'm looking for fun skilled game that do not require luck, not necessarily fps or rts game that are well known, but something else like turret defense to play and win bitcoin, or other small arcade tank based game, too bad steam don't support betting, because they have plenty of good indie game that can be ideal for this, steam should really add a betting platform, would attract many more players