Your comment is so kind—it really makes me happy! Thank you! 😊
As for the reward system, I was thinking of adding more biomes to make the scenery more varied (and also because it was a lot of fun to draw). Each transition between biomes would then serve as a checkpoint and unlock a new gallery image—like the girlfriend sending some motivation pics while waiting!
Also, a picture would be unlocked at the very end, upon reaching her house.