Might be good to support WASD as well as the Arrow keys for movement. 60% keyboard users can’t really easily move otherwise (there are dozens of us!). Beyond that the shooting felt good. Not too familiar with construct, but consider a slight camera shake on killing something, and some particles spawning to represent their death. A little goes a long way!

Eeeey! Another chemistry entry! :D The game was fun but I think bullets not despawning on a hit might be a little broken, I was racking up points off screen xD

That's a really creative use of the theme! I didn't even think of the periodic table!

Pretty fun short romp too - gave my trigger finger a workout :)

smoothly animated and you can pull up a quite high shooting frequency. was a good heating for my left mouse button :-)