[Bug]: Rooted Forest: skippable windpipe in Three Sheets to the Wind

[STEMathematics]

SuperTux Version

supertux2 dev v0.7.0-beta.2 - 7125492 (master)

System Information

Linux Mint 22.3 - Cinnamon 64-bit

Expected Behavior

A bug can not be exploited to skip a significant part of the level.

Actual Behavior

The green pentagon windpipe can be skipped with backflips.

2026-02-14.19-08-44.mp4

Steps To Reproduce Actual Behavior

1. Go to the level Three Sheets to the Wind (Rooted Forest).
2. Get onto the platform next to the horizontal green pentagon windpipe.
3. Perform a series of backflips until you get past the pipe, as in the video.

Additional Information

As far as I can tell, the issue of backflips being ignored by horizontal wind is indirectly mentioned in this comment: #2592 (comment), so this issue focuses on the odd skip caused by the bug rather than the bug itself.

Guidelines For Reporting Issues

• I have read https://github.com/SuperTux/supertux/blob/master/CONTRIBUTING.md#bug-reports.
• I have verified this isn't an issue that's already been reported.
• I have verified this isn't a discussion, or an issue about a crash or a feature request, but rather an actual bug ─ that is, the game did something not intended.
• I have verified this issue is not about wrong translations (use Transifex for those), or anything unsupported (e.g. third-party add-ons).
• In this report, I have only included details about one (1) bug.
• If I make a mistake while submitting this report, I agree to use the "Edit" feature to correct it, instead of closing this issue and opening a new one.

[weluvgoatz]

I don't really perceive this as an issue because 1) It only skips like 15 seconds of gameplay and 2) In the player.cpp code it explicitly states that Tux's x velocity will be applied for backflipping for every frame that he's backflipping.

[STEMathematics]

This issue is indeed not a big deal. I submitted the issue with the assumption that backflips should not make Tux wind-proof, and therefore this skip felt more like a dirty exploit rather than a neat trick. Of course, at the end of the day I do not decide what is a bug and what is a feature.

[weluvgoatz]

I wonder if this should prompt discussion on whether that backflipping behavior (Tux's x-velocity being applied every frame, overwriting wind x-velocity) is a good feature or not...