Woooop! :3 Lovely that you enjoyed the game!
Holding down to move is something we'll try out at the very least :) If that still doesn't feel good we'll try something else as well. We wanted to do the grid movement and make it feel crisp and responsive, so it was an oversight on our part that it kinda is hard on your hands when things get hectic! The 48-hour time frame of the jam was quite harsh, and we didn't want the game to be about just pre-making weapons, so we didn't include any way to store items. We will give it more thought in terms of the future of the game, maybe it'd be a thing you can unlock or something like that. For now the customers are just mean and impatient and make you pay for it! :P
Thanks for the detailed comment ^^ It was fun to hear your thoughts!