Triangular Assault

"Triangular Assault" is a top-down game where you control a triangle defending itself against incoming enemies. Survive by shooting enemies from the left and right sides. As the score increases, the enemy's appearance and speed accelerate, requiring precise timing to score without losing life points.

Basic Game Rules:

1. Use the A and D keys to shoot bullets toward the left and right sides respectively.
2. Survive as long as possible by destroying incoming enemies.
3. The next shoot is delayed if the player shoots while the enemy is out of the left/right range (he cannot hold the shoot buttons).