Formally, if we start game with no pre-writed scripts in it's folder, but with instant-win code somewhere in non-game folder, and after game start copy code from non-game folder to game, save it, and launch it to win game.

If we take Rules-As-Written, it is "Any%" run, because "if you use scripts, must written during the game" - what is true, because instant-win code was copied from other folder during the game.

If we take Rules-As-Intended, this is obviously a "NG+", because it still uses pre-made code, even if it was written before loading it into game.

I think what this strategy deletes most of diffrences between "Any%" and "NG+", and is just RAW-paradox.

The real new category could be "Low%" (complete game with no coding at all) - but there is no active speedrunners on it, and it has same tactics as normal "Any%", but more slow, tedious and boring then normal playthrough, as it forces you to move all units manually, even if they could move by their own (example: in last mission, you will be forced to manually control both Phazer Shooter and Shielder, what makes "assault" slower).

I think it could be argued that you wrote those scripts 'out-of-the-game' and copied them in, so not technically adhering to the rules. Factorio for instance also does not allow copying in blueprint strings in Any%. Rather, if you wrote the instant-win code into the in-game editor, during the run, then that seems like it should qualify for Any%.

I agree though, that there should be some other category that maintains the more interesting route to run. 'Low%' is maybe too far in the other direction, but maybe something like 'Missions%' or 'Glitchless%' which specifically requires all missions to be beaten.

Was considering speedrunning the game myself, but I get the impression that using the time speedup/slowdown isn't permitted. Which, for me feels anti-Any% because these are after all buttons you can use in the game.

Basically, "Missions%" is same "NG+" run, like PracticeBot13 did - winning every level by insta-win code separately. "Glitchless%" is just "ANY%" category. And "Low%", as you said, is too boring and tedious.

So it leaves us with "Cheat%" (where using cheats is allowed) and "Any%" runs with speeding.

Was considering speedrunning the game myself, but I get the impression that using the time speedup/slowdown isn't permitted. Which, for me feels anti-Any% because these are after all buttons you can use in the game.

i think speed controls are standard in Colobot, designed for real-time task management and programming, so banning them would remove a core element of gameplay. This only matters in IGT, because it would clearly mess things up. Other speedrun categories (e.g., Kerbal Space Program) allow similar mechanics since they are integral to gameplay.