Alien Becher Shooter

You control a lone character in a side-scrolling environment. Your immediate task is to survive waves of alien creatures. You move left and right, jump over gaps or onto platforms, and use your mouse to aim and fire at the approaching enemies. Scattered items, like bottles, can be collected for health or ammunition. The pacing is fast, and the difficulty comes from managing the increasing number of foes with limited resources. It feels like a constant scramble for survival in a confined space.