You should be able to refund your energy incase you accidently spend 50 on a great or want to minus like 100 energy from a smiley and spend it on a world. Also there should be ice blocks when your moving on them ist slippery and you slide. + if you agree :)
I dont like the new block interface i think it was better before its i dont like looking for the block i want to place i think it was better before but i like the new backgrond blocks