Jimmygozinya: After you connect a few dots, release the mouse button. That way it will reset to where you last released, rather than forcing you to start all over.
Went to Level 12 and then quit. I don't want to wait that long before it gets interesting -- which it didn't. A couple easy levels at the beginning is fine to get started on, but 12 dead easy levels is far too much.
Change the x-attack so that it just blasts the enemy off the screen rather than kill them upright. As it sits now, I just hold down the x key, and level complete.
I'd like to see a countdown to the end of a level (Timer or # trains left)
I'd also like to see more obvious arrows indicating the route. Try pure shades of red and green for the arrows.
@NetMonster:
I agree. I just randomly guessed a few words that might fit, and lucked upon the right answer. Even after knowing the answer, the riddle still doesn't make much sense to me.