I see, thanks for explaining! Since the game is launching tomorrow I've prioritized the easier / most impactful things to add.
Tomorrow when we launch the build will have an instant restart, which will only work when speedrun mode is turned on. The default key is 'R' but you can rebind it. In addition, starting a new game in speedrun mode will not trigger the intro cutscene.
We won't have the jump count or aggressive spider that we discussed here, but I'll keep monitoring for interest and if it seems like there's a committed group of speedrunners who would benefit from those features then I'm open to adding them in the future.