I will take these things into account in the next update. As for how to throw the blocks, just click on them with your mouse pointer, I hope this helps!
Yep, it worked! This mechanic is not present before, so it´s not easy to notice how to beat the boss. Oh, also please add a background. Especialy at boss battle, because there´s no reference of how much are you moving or where ^^. It´s a fun game ^^