Work backward from the destination
CloneUp: Stack Yourself describes a two-dimensional platformer in which clones can be stacked and used as platforms. Before making a tall stack simply because you can, identify the next place you want to reach. Compare its visible height and position with the surfaces already available. That gives the construction a specific purpose and makes it easier to tell whether another clone would solve the current route problem.
Include the departure point
A platform is useful not only because it reaches upward, but because the character can leave it toward the next safe surface. The listing also names spikes, so inspect both the stack location and the intended departure path. A hypothetical stack that reaches a ledge but places the next movement beside a hazard may need repositioning. The exact stacking and movement rules must come from the game itself.
Test the smallest useful structure
Mouse and touch are listed without separate clone or jump commands. Learn those interactions first, then try a modest structure that answers one route question. Observe whether it supplies the position you intended before adding complexity. The description cuts off after mentioning greater heights, so there is no basis for assuming clone limits, persistence between sections, or additional abilities. Build your plan from the confirmed platform behavior.