By level 10 I was ready for this to be over because after seeing every type of obstacle nothing was making it more interesting. But I kept going and I'm glad I did since the ending was worth seeing.
Viewing post in The End of the Tunnel jam comments
Hey, how dare you forget about the double hole guillotine tile introduced in level 12! That tile was so good, thatI initally wasn't even going to use it before I slapped the guillotine on top.
Ok, joking aside the levels do kinda slow down a bit, which is why I made 12-15 shorter than the ones before it.