Dangerous Dave in the Deserted Pirate's Hideout

Thank you for giving this amazing game some attention, it was one of the first (maybe even THE first) games I ever played. I recently found this classic again and I have finally been able to finish it.

A few interesting things about this game which aren't shown in this video:
- In level 3, there is a purple orb all the way to the right. It is actually possible to collect it without running out of fuel on the way to the exit, allthough it takes some effort (preserve fuel by jumping before using the jetpack and walking over the 2 blocks)
- In level 6, it is possible to go through the exit door without the trophy. If you walk all the way to the right, you'll find the area that is normally in the warp zone of level 8, and you're able to collect all the treasure there (yes that's right, you can collect all these crowns twice!). You can even pick up the trophy in that area and use it to go to level 7 (using either the door in the warp zone area or the normal door of level 6).
- In level 6, you can also walk to the left (or all the way to the right even beyond the warp zone area). If you walk to the edge of the level, you will enter a special warp zone that's glitchy and unplayable as far as I know.
- In level 9, you can jump over the wall at the right end of the level to find some treasure, a gun (if you pick it up, you'll find that you're trapped with no way of killing yourself, I fell for it when I found the area and had to restart the game), and the letters LANC written in purple orbs:
https://imgur.com/a/p7A6pqH
I guess it's some kind of easter egg or a message from the developer. Does anyone have a clue what it might mean?

There's a trick to jump up a wall: if you stand at the right position under 2 or more blocks that are on top of eachother, you can "climb" these blocks by jumping. This allows you to reach some places that are otherwise inaccessible, such as the roof of the lvl 9 warp zone:
https://imgur.com/a/GrVuS33

There might be some more secrets. I really hope there is a way to reach the area with all the sceptres in lvl 3, allthough I haven't found it in like 10 replays of this game.

Anyway, thanks again for playing this old gem. I just wanted to share these "secrets" with other people who like this game. If anyone else knows another secret/the way to reach the sceptres (if there even is one)/the meaning of LANC/whatever, please let me know!