RexP Madeline crossover

Where to begin.. this started when I was watching https://www.twitch.tv/bananasaurus_rex while he was playing Celeste the other day. As a joke I did my daily sketch as a portmanteau of his channel mascot and Madeline, the protagonist of the game he was playing. Folks liked it so much I ended up doing a full illustration of it (well more of an excuse to practice cityscapes which I sorely need).