Inspired by the literature of Arthur C. Clarke and the 2D Exploration Platformers of the 90's and the 2010's, SENTINEL is a 2D exploration-based platformer that takes place in an alternate future. When a mysterious pyramid structure was discovered during the 1969 moon landing, humanity began focusing less on our planet and more on the stars. After years of research, humanity finally discovered a way to enter the strange monolith, but there was a catch: every person who entered never came back out. With volunteers dwindling, a bounty was raised to entice new explorers: $150 billion to the first person who can successfully enter and exit the