Most levels I got all 3 side missions in one run, for the ones I haven't I have specified the side missions completed in each run.
The secret treasures are not particularly hidden, if you attempt to open all chests you will get enough.
For the do less than x shots (and bomb kills), use grenade launcher as it can kill multiple enemies in one shot.
Level 1 - 0:05
Level 2 - 2:31
Level 3 #1 - 7:05 (1&2)
Level 3 #2 - 46:53 (3)
Level 4 - 10:07
Level 5 #1 - 17:52 (2&3)
Level 5 #2 - 49:37 (1)
Level 6 - 22:51
Level 7 - 27:39
Level 8 - 33:22
Level 9 - 37:56
Level 10 #1 - 41:34 (2&3)
Level 10 #2 - 44:12 (1)
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