The concept with two worlds or timelines is brilliant. I really enjoyed that twist. The phantom version of the character is a fantastic feature and adds a lot of depth. I wasn’t quite sure what the coloured blocks were for, but perhaps I’ll figure it out later. As someone who specialises in casual games, I always appreciate having a tutorial built into the gameplay. I found myself wishing for one here. Jumping upwards and sideways was a bit tricky for me, though that might just be down to physiology.
Overall, it’s a solid platformer — well done!