Adventure
Super Oscar gives jumping and attacking different keys, so decide which problem the next action is meant to solve.
Read the obstacle in front of Oscar
Super Oscar describes a platform adventure with enemies, obstacles, treasure, and abilities. Before an action, identify what is actually interrupting progress. A gap in the route and an enemy on the route are different problems. The supplied controls make that distinction concrete: arrow keys move, Space jumps, and Z throws a fireball. Pressing an attack does not explain how a traversal problem will be crossed.
Watch the landing as well as the jump
For a jump, look beyond the takeoff point to the surface where Oscar should arrive. Consider whether a visible enemy or obstacle occupies that destination. This is a route reading habit, not a claim about a particular jump distance or an enemy that can always be defeated from above. The game determines the actual physics; your plan should at least name both the departure and the intended landing.
Give an ability improvement a practical question
The listing says jumping ability and fireball power can be enhanced. When the game offers an improvement, read its information and connect it with a problem you have encountered. Does your question concern reaching a platform or dealing with an enemy? Keeping those purposes separate makes the effect easier to recognize afterward. A clear account of the obstacle and intended action is more useful than treating every upgrade as an undifferentiated increase in overall strength.