PACMARES!
This was an idea I had a while back that I plan on at least attempting with clickteam fusion. It is a pacman clone but with 24 other themes on a 5x5 grid. Themes would include cartoons such as Rick and Morty, Scooby Doo, Southpark, Looney Tunes, Disney, and other such memorable themes. Each character set would be a different story and all 5 of the beginning themes must be beat to open up the second set of 5. This continues all the way until 25, which will hold the original pacman on crack. Each theme has about three to five levels, with that number being shared at the beginning in advance of course! I may add more stuff like collecting stars or something in addition to power-ups. Stars could either unlock level sets early or three per theme on all 25 themes could open up super-secret bonus boards.