Since game is out, I am not able to finish a successful run but I am experimenting :D

You can use "can you do this" on drones on level 2 and when it hits the drone sometimes you can land on drone and jump to higher level which enables you to early access to Slippy's heart.

Similar to the previous one, you can get first Purple Token on level 2 with jump+down attack to drone.

You can skip slippy text box on first jump pad with jump+down.

Is this for 2.0 or 2.1.

If 2.0 Slippy Skip is definitely possible but it is quite hard to do first few tries in a run. With how often I fail slippy skip it would be time loss.

Eventually, when this run starts getting optimized slippy skip might be very useful to try to get record but right now it's just a "good to know" type thing.

Also you can seem to land on top of the flying dudes and ride them up. I've done this accidentally in a few runs and you can just ride up to top platforms in mars and even Meme Cementery but it's very RNG based.

I agree with bowserstrikes. I have a consistent way to complete skip slippy by getting running to the right edge of the platform closest to the green barrel and waiting for the drone to get into position (takes 2-5 sec.). Then I chair smash it, jump on the green barrel, and jump to the ledge. This however is a problem because you need to break the barrel later in the level for its coins. Meaning that you would have to get up to the ledge a second time most likely after getting all the coins on the upper level. This would involve (A): dieing, as for some reason your spawnpoint is saved as soon as you reach the platform, regardless of weather or not you saved at the cabinet. This however cost somewhere between ~10-12 seconds, in which case your not saving time. or (B): By the time you finish the upper level and go back to the lower level, there should be a crowd of drones jumping at the foot of the ledge. If you get a lucky chair bounce of them, it will get you up, however this is really inconsistent. So in short slippy skip isn't viable in my opinion. Not enough time save unless you can get something consistent with the drones.

I never thought of jumping from green barrel it is a good idea :D but useless as you said.