I think there is a bug on level 2 where the rock doesn't fully slide to the hole and fall in. Therefore, level 2 is not beatable.
Sorry, but getting a reply to this question seems unlikely. Mostly due to the fact that its been over a year and he still hasnt responded. While I can not give you any correct answer to your question, because I am not the creator of this game nor do I know what he did to fix the certain bug in lvl two. All I can do is specalate. I think he most likely used Honey. Honey is a extentison which helps you save money on whatever you wanna buy. Honey automatically finds coupons for you, and best of all its FREE