Please, more checkpoints!

[Marc]

I'm currently on the level where i have to try to get in the warehouse, but it is frustrating the life out of me because one mistake and the game erases every bit of progress i've made so far in the level!

Bearing in mind there's a fair bit of trial and error involved in some parts, it's absolutely imperative that at the very least if you find a secret or destroy a bird that the game should create a checkpoint then and there! The sewer level seemed to create them all the time, so why is this level completely devoid of them?