Thank you for your comment, regarding the 3D movement we are aware now that it makes the game a bit hard to play so we will certainly be fixing that after the jam ends.
Regarding the pressing of R resetting Kiwi's position, this is an intended mechanic, as the main difficulty is to be able to properly create a path to both the key and lock in the same go. If we allowed people to just get the key, and then move their starting room next to the lock for example the puzzle aspect of the game would diminish considerably. (Remember that pressing Shift zooms out so that players can have a look at were they are without resetting their position, as explained in level 1 on the grid scene)
And the cells being hidden is done on purpose to entice the players to explore before trying to construct their paths. Though we do understand why this might feel like a bit of a chore if the platforming section and moving between rooms felt a bit annoying.