A attack is not very effective against even the easiest enemies, either knocks them out of range of the rest of the attack or doesn't knock them back at all allowing them to counter easily.
I would like it if you could still equip items to the hero after you finish the level you are on, with so much going on I sometimes forget to equip upgrades and then the game is over and I lose them.
The only thing I don't like is that it doesn't recharge to full between levels so if you end a level with almost no charge you start the next level that way.
So I notice there is an achievements box at the end of a level, but I nothing shows up there. There should be a place where I can check the achievements for each level so I know what to do to get them.