https://gyazo.com/b95675ff786f3291e01cebd59c6ddf2e I've managed somehow to pull this off, made it without cheating through (using gyazo because i've been having issues when attaching images since yesterday).
Fun game, and I do have a suggestion: add a texture to the wall on the back, it'll make it easier to get a reference point in the levels were the object/wall falls down.
Cheers! ;)