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First suggestion: Rename levels
It's a bit confusing that the levels don't have their own names and are numbered instead.
Here are the names of the levels to make it easier to change them:
Level 1 -> Cave
Level 2 -> Hill
Level 3 -> Autumn
Level 4 -> Sawmill
Level 5 -> Depot
Level 6 -> Mountain
Level 7 -> Peaks
Level 8 -> Volcano
Level 9 -> Jungle
Level 10 -> Temple
Level 11 -> Cliff
Level 12 -> Highlands
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Second suggestion: Add the new levels
The game has been receiving new updates and new levels, so it would be nice if they were added to the list of levels for the “reach the level” format. Here are the new levels:
Level 13 -> Ridge
Level 14 -> Brink
Level 15 -> Summit
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Third suggestion: Specify the “when you touched the flag” in the rules
It would be good to specify what exactly counts as “touching the flag". Is it enough for your cube to touch the flag, or does your avatar have to touch it?
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Fourth suggestion: Add a new format for individual levels
I think it would be a good idea to add single level categories, since reaching the furthest levels from the first level can be quite tedious if players only want to speedrun a specific level.
The format would be something like this: if you just want to speedrun Peaks, for example, you should be able to see in the video how the player teleports to Mountain and from there how reaches the flag of Peaks. I think the rest of the rules could remain the same.
The categories for this format would be:
Cave to Hill
Hill to Autumn
Autumn to Sawmill
Sawmill to Depot
Depot to Mountain
Mountain to Peaks
Peaks to Volcano
Volcano to Jungle
Jungle to Temple
Temple to Cliff
Cliff to Highlands
Highlands to Ridge
Ridge to Brink
Brink to Summit
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Fifth suggestion: Custom rule for Summit level
Since Summit is the last level and there is no flag to touch, as you have to place it yourself, the best thing for this category would be for the run to end when you place the flag at an altitude of 2763m (the maximum altitude in the game). The time would stop counting when the flag disappears from your inventory and is seen to be placed at the indicated altitude.
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Sixth suggestion: A cubeless option
This would be an interesting option for speedruns, as runs could be done without a cube but with tools, and others directly without a cube and without tools. I am aware that there are certain levels that can be completed without even taking out the cloud cube for the jump advantage. This option would have the rule that you cannot even take any cubes out of your inventory.
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Bonus:
I would like to know if I can become a moderator to manage the game's speedruns and their categories more actively. There is also an official Discord server for the game, in case you didn't know. https://discord.gg/hFhXSE2KW8