Cannon Strike is a target-shooting puzzle built on trajectories. You control a cannon and fire at targets that are rarely in a straight line — the solution is usually an arc over an obstacle or a bounce off a surface.
Levels add moving targets, limited ammunition and obstacles that block direct shots, so each screen is a small geometry problem.
Shots reflect off surfaces at the mirror of their approach angle, so planning a bounce is a matter of geometry rather than luck.
In later levels, yes — which turns each screen into a puzzle about the most efficient shot rather than a shooting gallery.
Yes — tap to aim and fire. Nothing to install.