Looks awesome but somehow i cant download it? I bought the new Bundle and this was included at a later date, which might be the reason.
No, games added to the bundle after you paid for it should also show up.
From the bundle page,
click on download at the very top left. That will show you the whole bundle. Then search for Micro Mages by title:
You'll have to go to the bundle downloads link and click on the recently added games individually to get them to associate with your account.