Potential obstacle sketches
Here I designed potentially for the game. One is an evil demon, the other an angel because I thought it would fit for an angel to be the natural enemy of our ghost protagonist, the other a reaper to eliminate the ghost’s spirit.
Potential rewards sketches
One reward could be a soul which the ghost collects to make himself human again.
The other is a ghost coin which would be the currency in the supernatural landscape the player travels in.