There's a new 1.5.1 which at least on Windows is still bugged in a way where, you fire up the game, and it says 'Pixel Studios Presents' and then hangs for a bit and crashes probably when trying to draw art and such...
There's a new 1.5. I can only speak for the Windows version at the momment ~ it's not compiled right and errors up on startup with missing glibc, SDL dlls and so on...
Upscaled graphics are borked in 1.4, but I'm glad to see this project is still being worked on given what happened in 2020
EDIT: They only work properly in 852x480 & 1704x960 windowed modes if you boot with original graphics and toggle to upscaled, restarting with upscaled = broken backgrounds...