Day 2 + 3
So, being indecisive I decided to attempt the game in Unity instead. Spent the last two days watching tutorials and building a simple platformer using free assets which I'll swap for my own at some point. I've managed to create solid platforms and a player that moves left and right and can jump, which is cool! I'm having an issue with the player toppling over when moving fast, so need to troubleshoot that.
Next, planning to create a camera that follows the player.
Getting to grips with Unity is definitely challenging so I'm happy with what I've achieved so far.