Tontie is a whack-a-mole game. It all starts out so simple. Use the hammer to whack the one-eyed mole as it comes up out of the hole. Collect money if it drops any. Lose life for missing. Sometimes get life back if it drops hearts instead of money.
Then it turns out there are different kinds of moles. Then it turns out there are also different kinds of hammers. Then it turns out that not all hammers can hit all moles, and some hammers need to whack twice instead of once to kill some moles. Then there are the treasure chests, explosives and ray guns.
The eyeballs with numbers are the worst for me. Not only do I have to stop and think about what button I'm pressing, sometimes I'm not whacking what I think I'm whacking - and sometimes what I actually whack is something I don't wanna whack.
In the end, it's still simple. If it has an eye, you must whack it before it disappears. (Unless it's a bomb. Those are all bad.) If you don't know what your hammer does, try not to whack anything that doesn't have an eye. And collect calculators. Those are important.
The level of silliness reminds me of the original Insaniquarium. Feed fish, get better critters, defend the tank from aliens using a ray gun. Also well worth wasting a few days if you've not seen this before.