Sorry to hear you didn't like the game! This was our first Game Jam and our team was only able to commit 1-2 days focused on development due to external factors. This was the cause of the bare bones nature of the game.
The attack does work as intended! You just need to retrieve the necessary upgrade to unlock it, as you did with the initial jump at the beginning. Apologies if this was unclear!
I replayed the game. Yes, you are right, there was an attack. I understood the problem, it is not clear what improvement occurred. It lacks intuitiveness. Now I understand the concept. Reminds me of Risk of Rain. There, too, the essence is to return and explore all the time. Play, I think you will have new ideas for the game. I would add a radical change in ability, which completely changes the essence of the gameplay. In general, play with the mechanics. Sorry for the premature conclusion