Shamitako

KoL is gr8. Although you do have to have enough patience to play around limited adventures, especially early on in an ascension.

I've tried to solve the Timburr puzzle multiple times without help, so I think I got enough patience

Just seen a good few complaints about the setup. It's pretty similar to other F2P setups, although IotMs are usually more intricate than "buy me for more adventures" and usually require strategic use to get value from them. Even without there's still plenty of strategy to minimizing the number of adventures, and in turn days, needed to ascend.