Terrifying monsters! The menu and intro screen was a nice touch but it becomes annoying to have to wait for the intro to finish before you can play again. It's a bit too hard for my taste and I die a quickly. Perhaps gradually increase the difficulty over time so that the player can become comfortable with the controls and the gameplay?

Any chance you could also upload a web version of the game so that more people can try your game?

https://defold.com/manuals/html5/#creating-html5-bundle

This is a really strong entry in the jam! It has outstanding intro with nice artwork being a menu also, it builds a nice atmosphere. The visuals, even though made in 3 days and you didn't have time to polish it, is the best selling point here as the designs of the enemies are amazing! There is a lot of splatters and it improves the feedback on hit always. The game is playable and maybe it only lacks now so goal, aim. If polished - this game could be really good! Congratulations!