Modifying comptime values in modules produces inconsistencies

[Inky-developer]

Describe the bug
Changing a comptime variable in a module from a function within that module is currently allowed, however the updated value can only be seen by the modifying function and not by accessing the variable from outside the module.

Example: https://inky-developer.github.io/debris-playground/?code=55656a39d2ce36a0447f3ac314b5dbe58fbf879b

Expected behavior
Either modules should be consistent with other objects and don't allow changing comptime variables, or modules should not be normal objects.