Transformers Autobot Led sign

Transformers autobot led sign.The WS2812b leds are controlled by an arduino nano and everything is powered by an USB C power supply. The approximate wattage is 7W. There are 3 buttons installed, 1 that turns it on and off, 1 to switch colors and 1 to start a heartbeat glow effect. What I could improve, replacing the arduino with an wifi ESP and making better gaps to shine the leds through. Parts used:~600g of filament (I used PLA out of convenience)26x WS2812b Leds4x M3 inserts4x M3 40mm screws (30mm if you dont use the hanger)1x Arduino Nano2x Tactile micro button switch, length of button 8mm1x USB-C Socket SUS304-H1x Rocker Switch (19.7 x 13.1 mm)1x fuse (3A fuse advisable)Lots of hot glueElectrical tape and shrink tubeWire to solder connect everything