It's all functional and present, but I can't say I found the game very fun. The music is nice but I found the gun sound fx somewhat draining on repeat, and was fairly disappointed when the music didn't change speeds with the gameplay. As others said, it was unclear at the beginning that you had to click on the enemies. I like the background images and the character sprites, but the player animation look a little wonky when running (mostly because the upper body seems static) and it almost seemed like the enemies didn't even attack. The game seemed far too easy and the jump button wasn't necessary, maybe you could add some platforming elements to it? Spikey pits, ring of fire, etc. It's not bad work necessarily, I just think it could use a couple coats of paint and a little more originality.