Create a 2D digital illustration in a bold, bubbly psychedelic font with rounded edges and playful proportions. Each letter should be filled with bright, solid colors like red, yellow, blue, and pink, arranged to alternate vibrantly across the word. Surround the text with cartoon mushrooms featuring polka-dotted caps in green, red, and pink. Include a smiling sun and cheerful graphic elements like a yellow smiley face nestled within the letters. The overall style should be trippy, retro, and inspired by 60s counterculture art. Use clean, thick black outlines for all elements. White background. Square aspect ratio.