This is an interesting concept, but definitely needs some work on the fine-tuning. For the first four rooms, I just placed items out of reach because the numbers were way too small to ever make sense to collect and then I got an item that made me step 10 steps per step with no way to bring the step target to a multiple of 10. I think instead of manipulating the goal state, it might be more interesting to manipulate your current step count, as that might add a nice routing challenge. Overall, I think this has potential, it just needs a little more work.