Thank you for the feedback! Yeah the boxes are a bit too slippery, we thought that could be an interesting mechanic to play around but we end up tweaking it enough. On the second level you're meant to grow the green box to make it through and not stack them, we did see many people doing it like that though we wanted to keep the solution some what open but maybe we didn't communicate the intention well enough in the level design. Anyway thank you for playing!