Hi, I was interested in doing the TAS for the genesis version of this game at some point so I looked into that clip. All you have to do is run up to that ledge Duck and hold left, then unduck and you'll clip through it. I checked most other ledges in this stage and the only other one like this I found was in the same room on the opposite side (right near where you enter the room from the right).

In stage 2, you could probably damage boost from the flies onto the spikes near the start of the level, but I'm not really sure how well they can be manipulated or if it's feasible in real time, just throwing out my theorized strat for the TAS.

Also just wanted to point out that kicking midair cancels the dizzy animation from falling too far.

I plan on getting back to TASing this game soon (I had only done a test run of the first 2 stages so far). I just figured I'd throw information out here as I find it, just in case anyone wants to pick this back up or something.

Also, nice run!