How to Use Charge Melee Attack in Witch It!
First you have to hold your key for melee attack (V or Middle mouse button)
Then you have to wait few seconds. After that you will heard wierd sound. When you will heard it, you have to release your melee attack key.
As you can see, i hit almost everything on the table. But when i only tap it i will hit only few things.
On this photo you can see i hitted only stand and lettuce.
There is one more benefit, if you charge your melee attack you will deal bigger knockback and bigger damage!