So, this was my first solo Ludum Dare and I am very happy with how my game turned out!
Sure, there are a few things that could have been done better but overall I think it's pretty solid, even quite polished...
Check the game out here! (HTML5)

Have you played the game? Great!
Here come some of my thoughts and lessons from LD 45:
Applying the theme is really underrated in my opinion. You start with nothing basically refers to most games, but I think the challenge is to build a whole game around this idea. Naming your main character 'nothing' or starting at 0 dollars is absolutely fine, just not very creative. I envy those titles that make you say: Oh, that's clever. Not to say that my interpretation is perfect, tho!
My most important lesson is to keep it small and simple. This time I picked an idea that is fairly simple in it's core but can be expanded on. And it worked out great. I had enough time to build the game, do graphics, make sound and when all that was done I spent the remaining time adding more features. Out of personal experience I know that aiming too big often results in the skeleton of a great game. A great start but pretty useless on its own.
I really like the pixel look I ended up with. Lighting really brings life into 2d scenes and I love the shadows the numbers cast on the walls, although probably nobody notices them. If I had just a bit more time I would have added some post processing, maybe some bloom, just for the final touch. Long story short, pixel graphics are (relatively) easy to make and look great!
And finally, some feedback for Ludum Dare. As mentioned earlier this was my first solo submission and I really enjoyed it. For me the Compo is the most appealing. The 48 hour time limit fits into one weekend (I always lost one day of the Jam because of work/uni) and I prefer the strict rules (Compo games are somewhat more impressive, because they did it all themselves whereas Jam games can be made up from existing assets and stuff). However, the Compo is a solo contest. This time my team couldn't participate but usually I develop with friends. I wished there was a 48 hour contest where you have to make an entire game from scratch but for teams of two or three.
Alright, that's it!
Thanks for reading and good luck hunting those bugs ;)