It was my first Ludum Dare Jam, and here is my post-mortem.

I made a game “Tiny planet”.

What went right:

1.  I`m familiar with coding. In fact, “Tiny planet” is a sequel to “Tiny world”, which used the same engine.
2. No time issues. I have no difficulties organising my work, and all shedules were completed. Testing also was quick, due to minimalism of my game.
3. Graphics. All graphics were easy to make: I already had stickman, kitten and powerups are small, other things were built in editor itself. Even the fact i`m bad at drawing didn`t bother me.

What went wrong:

1. Music. I`m bad at composing, more than that, i never used music in games before. I barely made the background music, but i couldn`t make sound effects. Gonna do warmup next time.
2. Difficulty. At first I thought like “What a nice quick game I make!”, but then I realised it`s hard for other people. I had to add a bunch of hints to make it possible.

What I learned:

1. Making music for games.
2. Harder isn`t always better.
3. Too little gravity is bad. At first i had usual 9.8 gravity, but i had to change it to 49.
4. Basic embedding swf files in html.