Major polish update from the jam version. I've been working on this for about a week now.

 Heres what i added:

• ScReEnShAkE - lots and lots of screenshake
• improved sounds - most noteably the hover sound in the main menu and bonus sound
• changed icon - changed it from the default lightning icon
• added particles when the player collides with something
• added splatters when enemies die
• improved GUI - more distinguishable health and score 
• floating heart - added a heart icon that floats from the enemy to the health counter
• smoke trail behind the player - added a trail of smoke when you move
• squash and stretch when you move - subtle but you strech while you're moving
• changed the players face - also really subtle but gave him a more intense look
• added a game over screen when you die
• made levels change every 12,5 seconds - the game got really boring after a while in the original version and you had to die to go to the next stage

What i plan to add in the future:

• proper animations for the enemies - there are some animations now but they're really hard to notice
• collectibles/boosters - randomly spawning bonuses/collectibles to encourage the player to move around the arena
• achievements - something to motivate the player to keep playing
• streaks - killstreaks when you kill more enemies at once