Loving the game! I bought it but do I have to buy again to update?
Yes, however, we offer a patch system on our Patreon, where you can update from X version to X, which on average is around 400MB per patch. You can have a look, for example, here, on the latest free version: https://rift.ink/3NVi4JX
We greatly appreciate the support across the board, thank you!