The speed does increase during the runner. As it only constitutes less than 5% of the actual game, I admit I spent very few time on it (like 5 hours), and it surely could be more polished. If the runner makes you too dizzy, I really encourage you to just do it 6 times (even if you die on the first obstacle), to try out the real game. I know I should have made it easier to get to the actual game (like 3-4 tries), but this is the game I spent the 10 days of the jam on, so I'd be really grateful if you could give it a try (and not rate the 5 hours shitty runner, I admit XD). Anyway, thanks for playing !