A very intuitive use of the single control requirement, by having different actions bound to the same key. A novel idea and one that fairly well implemented given the timeframe that it was made in. Solid visuals with a little bit of animation to make the sprites feel lively and not just flat. Impressive.
You should consider how you export the game, is having two separate must-have files the best way you could have done so? Secondly, try to keep your download name and submission title consistent throughout. Finally, some tweaks to button recognition would be beneficial, there were a couple of times where I moved in the incorrect decision despite thinking I pressed for the correct amount of time, predominantly short presses registering as holding.
Overall, this is a good game and one I think that you should be quite proud of. With some polish to controls, some audio, and cleanup here and there, I could see this being something that could be placed on a marketplace. Well done!