I have a habit of taking too long to finish even simple projects, so one Saturday morning, I challenged myself to create a game before the weekend was over.
I set out to find an Atari 2600 game of which I could do a remake. Having Googled "Top 10 Atari 2600 games" I found a list with embedded YouTube videos. Among the entries was Kaboom!, an action game I had never played or even heard of before. I played a few levels in an emulator and started typing.
I completed Kablammo! on Sunday, and it ended up being the most fun I've had creating games so far. The gameplay is very basic, but things get pretty frantic on the later levels, and I think it has a nice rhythm to it.
A few days later I added a Score History feature in an attempt to up the replay value. Players can compare their 20 latest scores to see how much their skills have improved over time.