Guy from the Roblox game you talk to here.
I want to say this game is pretty good for a first game. Something I can recommend is first, make the game not crash when you die. Beyond this is just recommendations for updates on the game. What I recommend, potentially a way to see the enemy HP and also upgrades. Beyond that if you continuously develop this, I recommend making some higher quality textures, and more enemies. One more recommendation, add music in the background to make it not be silent. Other than that, amazing first game!