Visually it looks nice, a little dark at times I feel.
The gameplay of "go here and pick up a thing, then take it there" is a little lacking.
I would also avoid using 1x tile wide corridors in your maps as they make it hard to see where you are going at times and they kind of hide the location of the tiles of interest.
It would also be useful to be able to view the whole map with a hotkey or something otherwise it seems like you are just kind of rolling around randomly hoping to stumble on something.
It could definitely be made into a nice little game with a few gameplay / visual tweaks :-)