It's an evil level, and I'll do my best to explain what you need to do at each step. There is also a yellow colored gem at this point, and reaching it is also quite difficult. Not as complicated as finding the hidden gem which is almost impossible without a little help from the online community.
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5-3: Run It Bayou | All crates and hidden gems
[[Easy to miss] 2/272: Right at the start of the level. Bounce on the TNT crate and hit a hidden crate above.
4/272: And the two boxes on the right.
[[Easy to miss] 10/272: There are 6 incredibly easy to miss crates right off the bat. There are 2 on the left step, 2 on the right step and last 2 crates on the left step - hit them all before activating the red “! " Checkout.
16/272: Below, press the “! »Crate to spawn 6 crates. These are on a timer, so squash them before they are gone.
Yellow colored gem: Don't get on the jetboard! Instead, slide and jump onto the ledge on the right. Jump into the crates and reach the moving platform. Bounce on the stack of four crates to reach the yellow gem above.
29/272: Destroy all the crates on the way to / to the yellow colored gem.
39/272: On the jetboard, destroy the floating crates and the “!” Red crates along the way. Don't destroy the checkout line just before the end of the track! This count ends with the checkpoint cash register.
[[Easy to miss] 52/272: Use the line of crates in the water at the end of the jetboard sequence to go back up the wall and up a platform to a single crate of gold fruit. Make sure you don't break all the boxes so you can come back.
55/272: Smash the 3 crates to the right of the checkpoint.
63/272: Keep smashing crates along the main path until you hit a "!" Red. Checkout.
66/272: Activate the red “!” crate and jump the barrels to reach the 3 crates in time.
[[Bonus room] 88/272: Do not activate the "! »Switch to destroy the fruit crate below. Then hit the TNT around the red "! So you can go back and destroy the floating crates in time. Use a spinning attack. The rest is simple.
105/272: Smash all the crates to the checkpoint near the second jetboard. There are a lot of crates around, so get rid of them.
Hidden gem: Before the second jetboard, look to the right for a barrel roll. There is a " ! »Well hidden block behind the barrel. Hit him and walk back to the water - there's a hidden path of metal crates on the far right.
130/272: All found in the second section of jetboard. Make sure you catch them all, including the “!” Red crates.
- [[Easy to miss] 130/272: When you are on the second jetboard, reach the third area (second jump) and look in the lower right corner.
140/272: Destroy all these crates before boarding the bayou boat.
153/272: At the start of the riverboat sequence, you will destroy 1 crate and clear a wall of TNT.
210/272: The rest of the river boat sequence will allow you to collect as many crates. Destroy the rebound block (it's a fake, there's nothing up there) and trigger all the TNT. Duck instead of sliding to facilitate the rest.
219/272: Smash all the crates before the third jetboard. Make sure to bounce off the TNT crate to reach the high crate above.
247/272: Destroy all the crates in the third jetboard sequence. Die if you run out - the most difficult are at the start, during the descent. Turn around and ride against the tide to give yourself more control to get them. The rest, you can go back slightly to resume.
272/272: Hit the Nitro Detonator to complete your collection.