20 hours (~2 days)
I wanted to more familiarize myself with Phaser.js framework. Plus as a child I did enjoy playing this game on finnish gas stations. On computer (with mouse) it does not quite succeed being that enjoyable, so I guess this is directed to tablet audience. The real experience required actual finger pressing on buttons.
This app is my first single-player Phaser project. After learning (in Spacebombers) how to manage two separate game instances for two human players, this project was refreshingly simple.