I like this quite a bit.

Nice clear presentation. No sound ( I like sounds).
The gameplay mechanic is a bit tedious because you have to always move around the tile you want to move.

This is a fun idea - I like the humor angle of Darwin fiddling with the paleontological evidence. The gameplay was pretty simple; it might have been fun to require the player to reassemble the fossils in the right orientations, not just to have them get to the appropriate level. The pulling of tiles is a bit unusual, and I think it makes it a little harder to control - pushing might feel more natural. I like it, though - nice idea, nice graphics, good work!

I liked the concept quite a bit, but there was too much moving around needed and not enough gameplay depth.

I really liked this concept, definitely one of the best concepts of this Ludum Dare. Nice job, just too bad no sounds and moving the player is a bit hard.

As gnx said, nice concept but better make normal push movement instead of the vice versa.

btw. nice graphics.

Very polished; felt nothing like it had been made in 48 hours. My only complaint is that it was surprisingly short; it seems like you had everything down very well, and I was expecting to have a level wherein the switch-instead-of-push dynamic really became part of the puzzle. Either way, very nicely done.

Another scientist fooled ! Nice approach of the theme :)
Managed to beat the game on my second try, last level is quite stressful !

third level was tough :) Good little game

It has potential to be a good educational game. Well done.

I liked this entry... nice idea. Kinda finicky controls but feels like it needed them to avoid making the game too easy. Like how you captured the theme of this Ludum Dare. Yeh, I enjoyed it.