Hopman

Hopman is a single-screen platformer by Inufuto where the player jumps and walks between platforms and elevators to reach the exit on the right side of each stage, collecting flags for points along the way. Time-bonus scoring rewards quick completion, and purple monsters from Inufuto's earlier game Lift return as obstacles. Released across many 8-bit platforms.

You clear the level when you reach the goal on the far right.

You don't have to take all the flags.