Thanks for the feedback! All fair points.
The initial idea was around light and darkness, which are always 'joined together', hence the monochromatic look and lighting mechanic, but I hear your point. This is why we also tried to incorporate the game jam's theme in the game's story/theme.
We're quite happy with our levels in that they showcase quite well what we had in mind – but I agree that the game could use maybe one or two additional levels between levels 1 and 2 to ramp up difficulty more progressively, and the same again between level 2 and 3. The balancing of game length and difficulty is always a challenge during game jams!
Thank you for playing, and making it to the end. And thanks again for the feedback, very much appreciated!