Hi Karim, I have updated the game. I think it will now be a lot more clear to new player. EqualSigns will appear if you place the correct block in the first colomn. You can also click on the exclamation marks to get feedback on what is wrong about the placed blocks.
I would rather not give away the solution completely, but input to the power of 3 is the same as input * input * input. So you should use the input block multiple times, also the while block doesn't work. This is the last level, so good job on making it to the last level!
The code blocks are scaled separately from the rest, but are supposed to be the same size as the grey blocks. So if you change the scaling or resolution setting of your pc, the blocks will be the same size as the grey blocks.