Yeah, the slower speeds were introduced halfway through, when I realized I couldn't finish the latter levels alone at the original speed. That's another reason why early play-test is life-saving! When you build levels in a grid, and respect the proportions, even simple graphics like this can seem wow. To boast a bit, but hey, I'm proud that I found a good process (pm me if you want details), this game was actually made under 50 hours, because I was working other job one night (and sleeping the next day), so that's why the art and mechanics was kept simple, and with increasing challenges.