[Free>>Paid] Tower Ball - Incremental Tower Defense

According to a news post from the developer:

April 30, 2021:
Hi All,
The past week has been really interesting for me. Previously all my game development was done on mobile, and I came into the desktop space not really understanding how different it is. So, with this in mind, I've decided to add a price to the game. I still haven't decided on a price, but it will be less $10 USD or less, probably $5. With the purchase price, I'll also include free gems with the equivalent value of the purchase price.

The change won't effect existing players at all. This change will take effect in a month. The rate of gem earnings won't change at all. Any of the money I make in the game will go toward continuing the development into something I can be proud of.

In short, the game is currently F2P but will potentially stop being F2P some time around the end of May, with any previous activators retaining full access to the game. In other words, the game seems to be "[FREE]", by way of SG considerations, for roughly a month (even if it's approaching that label from a rather unusual angle).

Having had a few wishlisted games in the past that pulled similar- to my annoyance- I figured that this'd be worth posting onto SG.

You can find the game's steam page here.