The idea of enemies getting meaner by natural - erm, player selection :) is not bad.
I found the game not fun, though, mostly because there is no clear indication of what kills the moths - is it just ball contact, or does it require a certain amount of force? The correlation between my clicking and them dying was not that clear, and with balls jumping all around, I did not feel any real control over the selection process.

Each new contact with a ball, brick, lightbulb, or other moth causes some amount of damage. In particular, a ball resting on top of a moth might not kill it.

I love the idea of this! Awesome!

Interesting idea - the idea of somewhat indirect attacks was initially a bit frustrating but actually adds quite a lot.
Would have been great to see a few more slopes, or perhaps materials which make the balls bounce more or less. perhaps gravity vortex?

nice work - very original :)

The idea is very cool, I just wished there was a little bit more action, game-play wise. I would like to shoot those moths, not just drop balls on them! :-)

So, as a simulation it's pretty cool, it's just a bit lacking in the fun department. Especially so, since there is no way to actually lose a level.

The source code was a surprise (I had to re-compile for my 64-bit Linux machine) - it's written in Standard ML! That's cool!

This was cool. I felt like I needed an air hockey or brick breaker style of paddle to hit the balls around at the moths a bit more. It was annoying not being able to manipulate the lateral movement.

I love entries that incorporate the actual theory of selection over time. Although it was tough to determine how the moths improved. Damage resistance, speed, etc? Neat concept here - maybe add some challenge to the player (must kill in time limit, moths dmg player, ?) and you could be on to something :)

There are genes for: width, height, density, flying force, color, frequency of choosing a new goal to fly to, affinity to lightbulbs, affinity to balls, affinity to bricks, and affinity to other moths. I like to try to get the moths not to like lightbulbs.

I like how you have no "windows version" ;)
But seriously, interesting game that would be even greater with graphics and a squishing animation to know if the moth dies.

Good idea with the surviving moths providing the genetic basis for the next round. The physics (especially of the moths) were a little weird though …

Moth physics! :O

I like the idea, but you didn't give it nearly enough room to take effect. Three generations isn't a whole lot of time for moths to evolve; I don't think I'd have centered the game around the idea without tripling the number of rooms.

Looks cool, but I couldn't play without a Mac or Linux, sorry...

What DaveDobson said.