UPDATE LOG: 1.0: Created engine! Yay! 1.1: Fixed some bugs. 1.2: Gravity update, fixed some bugs. Wall jumping and ceiling clings added. Cat flings itself off of the platform when ceiling-clinging and walking "off" edge. Wall jumps only work on right wall/any walls with thin colors. 1.3: Hid sensor sprite fully. 1.4: Added two new platform sprites. Hold space to travel up the ladder. 1.5: Changes to wall cling. You can wall cling to cyan but you bounce off of purple.
Credit to griffpatch for the cat sprite sheet. Arrow keys to move, space to jump.