How weird, it looks like none of the textures loaded properly (Which is quite bizarre, as everything else loaded fine).
If you're experiencing this in the downloadable version, you can access your player logs by navigating to %userprofile%\AppData\LocalLow\nitori.itch.io\Impurrishable Night\output_log.txt (You can put this into the 'Run' window, via CMD-R) then linking/forwarding the file back to us, that'd let me determine if any errors occurred. Also Re-extract the .zip and make sure you don't run the application through the zip, as that may have unexpected results.
If this issue is showing up in the web version, ensure you're using a recent browser (Preferably Firefox or Chrome), though a few folks have reported general issues with the Unity player only to have them resolved by playing the windows download.
Lastly, it looks like while it's a frustrating graphical issue the game should still be fully playable for you, I hope that even if we can't resolve it you can still enjoy our game!