Translucent Red
If you want an arguably more arresting object, printing this heart with translucent red filament creates a heart that glows brighter (due to the reduced opacity of the plastic), and has a blood-red look.
Advanced Adaptations
If you really want to take this project to the next level (and increase your heart rate in the process), you could adapt the heart to use a Pulse Sensor that would read your heart rate and use that data to have the 3D printed heart beat in time with your own.
Some examples that have used this same idea can be found in Collin Cunningham's "Pulse Room" project (below), or this NeoPixel pulse display by Mike Barela, for any ambitious makers out there.
More MakeCode!
If you enjoy MakeCode and want to continue exploring you can check out lots more MakeCode projects on the Adafruit Learn System.
