The concept here is really good
any piece that moves is extremely OP, because they move at the end of the enemy turn, it's extremely easy to trick your opponent into making bad moves. It also allows for some unstoppable 3 in a rows.
For example, if first move of the game you place the axe in the bottom row, opponent moves, you place a piece under the axe, opponent moves top row to block your 2 in a row, axe destroys their piece and you get a 3 in a row with a single opponent piece left on the board.