2 hours in. Time to sleep.
So i've decided to combine the 'Card Game' genre with 'Platforming'. I have very basic card, hand, and deck code working with a couple of test cards working (forwards, backwards). A quick video of it in progress can be seen here https://twitter.com/BradLSandford/status/987530304360472576

Tomorrow will be the bulk of the coding work including getting a base set of cards working (movement, jumping, weapons) and also working on basic enemies and environment stuff. Trying to find the right balance between platformer and endless runner will be interesting, almost tempted to go down the roguelike route.