Thank you! <3 yeah, the gameplay is too tricky and overcomplicated :D To finish the level you need to place blue lantern in blue spot at the top of the level and an orange lantern at the other part of the level. The thing is - you need to light the orange lanterns for the orange guy to be able to walk (it 'builds' a new part of level for him) and blue lanterns to build level for blue guy. Blue guy has a orange lantern and orange guy has a blue lantern.
But, as I said, it's really overcomplicated, we thought it was a fun idea and then it was too late to change it, so we went for it :D