Over the years in Crypto, there have been some very complex setups and I'm sure there will be even more confusing ones in the future.
I came across BUSD Kingdom and I like it's simplicity.
A) 1 Castle in the middle, multiple roads where monster can attack.

B) Buy towers that will defend your castle. Every monster killed gains you money.
C) Collect earned money in your castle, before your chest gets too full.

Each tower and the castle can be upgraded to provide more earnings or a bigger chest to collect more earnings. Upgrades are paid for with in game gems.

BUSD Kingdom is a pretty easy game and the first tower can be bought for roughly 8 BUSD. That should be earned back within a month, without compound rates added. Less if you have upgraded a tower.

Give BUSD Kingdom try and let me know what you think.