Thanks for the feedback! That's exactly what we wanted with the powerups. We would have liked to extend it with different and multiple weapons as well (not just the blade), but didn't want to over-scope too much.
I think you mean how the character will jump straight away if the jump is held down? I'm not sure what the consensus is on that. There is a jump buffer implemented so if you press jump close to the floor you will jump regardless, to make the controls easier. I wonder if it would be better to only jump when the key is pressed rather than held down which would still work with jump buffering.
Thanks again :)