BTD6 visual bugs (multiple)

I have a gaming laptop with a 5600h w/ amd igpu and a gtx 1650. Running on proprietary driver 535 with igpu running latest linux mint driver for it. The first time I launched BTD6, everything worked. I tried to alt-tab, however, and immediately my screen began to flicker, with all non btd6 windows flashing in and out. When they would flash in, they were almost completely transparent, but I did manage to painstakingly kill the btd6 process. However, I definitely broke something because when I launch the game now even after a cerification and reinstall, the cursor appears extremly pixelated and with red lines, and the screen is one color. The bug appears fully graphical, however, as the sounds work and I can "feel out" and hear the buttons when I press them. Any help on either the alt tab flickering or (more urgently) the unplayably bad single color bug? Thanks so much for all you all do in advance!
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