From the Humble Armor Games: The Retro & Reborn bundle. Haven't played through this one yet but GemCraft is a classic if you're into Tower Defense or Flash games. I played through Frostborn Wrath (another GemCraft game) on my YouTube channel here:

https://youtu.be/6SHpo4cBDUU

On a Related Note:
If you're at all into (mostly PC) 4K Gameplay videos without commentary, I'd love it if you checked out my channel here: https://www.youtube.com/c/ShushGamesChannel

If not, no worries and good luck!