I've just given the 2.0 version a go, and it's a really good update. The tutorial was a helpful addition and I like how the second character added to the gameplay, making you switch between them to complete platforming puzzles.
There are a few issues with player experience though - the main thing that really held me back from completing it was that the 3 lives limit just made levels really frustrating to complete. Instead of feeling challenging, it just felt troublesome. I think it would really benefit the player to just have unlimited lives and to keep getting respawned to the last checkpoint until you complete the level.
A couple of things like getting impeded by walls mid-jump and just a lack of depth-perception to work out if you're on the right plane to land a jump could greatly improve gameplay too.
Nevertheless this was a great update and it was a pleasure to give it another go. :)