A few improvements:

• do not kill the enemy to make it easier to jump on the bat,
• hit the air right after bouncing off the bat to make it fly up faster,
• do not tak any food. Unfortunately, I still haven't found the setup, but I will keep trying.

Nice! I've tried many times and it's hard to imagine that you will find a setup that allows you to do this trick in e.g. 80%. I am making a prediction that max 1 week and someone to do WR.

Hi, Is this a problem only on my computer or this is some kind of trick to speedup loading next level (loading black screen with yellow words). In my situation when I finish any level fox stuck for few seconds.

For comparision I found few videos. Here, on that one, lag on the end of the level is < 1s:

But here delay i few times longer > 1s:

In my case it's even worst. Any idea how to solve this proble? I try to use DOSbox with 6000 cycles or online game https://www.retrogames.cz/play_711-DOS.php (but this doesn't help).