Thank you for playing!
Could you specify a little more on what you found hard, please? Is it the difficulty of the levels? If you mean the level difficulty, perhaps you reached the final level? The final level of this version was very experimental on difficulty. It ended up being too difficult, and I apologize for that. It'll probably be replaced next update, when I add more levels. Meanwhile, there is a spoiler in this game's description you can click to watch one of the solutions if you like.