@imagui78 dont worry about the slots it only takes about an hour or two to get the jackpot then you never have to do it again if you dont like it. But it would be cool if it could take like 1% skill and 99% luck.
Maybe instead of having to click a completely random space on a random map have there be a little indication of there being a place to click to go to the secret cave like maybe some small rocks next to your penguins feet.
If you are a rather low level dont worry about your money soon you will have enough to buy 1000 more fully upgraded houses!
PS: try to do as many quests/achievements as you can
 "Bloons TD 5"){kind=icon}
 "You Have To Burn The Rope"){kind=icon}
 "Achievement Unlocked 3"){kind=icon}
 "Best Fun Game"){kind=icon}
 "Proke"){kind=icon}
 "Cuboy: Cubeture 2"){kind=icon}
 "Pingy the Ping Idle RPG"){kind=icon}