Having never played (or even heard) of Lemmings before, this was really tough. I felt like my screen was obscured by buttons and I never saw where exactly the hrldngs needed to go. Somehow I was able to beat level 1 though.
Thanks for checking it out! Sorry to hear that, it is quite challenging especially for people who have not played Lemmings. To move the camera, hold down the middle mouse. You can also set the mouse to push the camera when you move it to an edge in the options :)