The Android Demo Version (9d1) seems to have issues addressed in the paid version (1.2 and up) solved ~1 month ago. They occur on the Main Menu. This issue is easily repeatable when starting the game; alternatively, it can also occur when you ignore the error, open the menu, and return to the Main Menu, repeating the errors for Shaders (0:39, 0:45, 0:83, 0:93, and 0:94).
As a hopefully helpful additional aside, one can ignore the error, but when this compilation fails it leads to issues later in gameplay as well. When growing a Mushroom I encountered an issue with a slime-esque Mushroom (I could not identify it for various reasons). When being shown the "Chapter 3: A Girl On Her Own" screen, it is unable to be displayed due to the same Shader Compilation error.
Naturally I would ignore it, but this also means I cannot view the "Info" tab either, giving the same errors which causes a massive gameplay issue where I cannot view the traits said Mushroom—additionally, it can be assumed that it would be impossible to complete the run (as when reaching the end it will display the Info Screen for that Mushroom, therefore "soft-locking" that playthrough).
I understand the demo for Android in particular may not be a focus at this point (the other demo versions are in 9d5), but it would be appreciated if this issue were resolved.
Thank you for reading through this and have a splentastic day!
[Edit: Fixed a grammatical error.]