By contrast to the other people who played I realize about what I had to do quite quickly and I actually liked the gameplay. It was actually fun to play. 

Two important advices:

1. - You should make the game much easier at the beginning. Players (especially in a Jam) tends to quit a game quite quickly if they can not progress easily. You always have to look for a balance between difficulty (it could make the game annoying and not enjoyable) and lack of challenge (it makes de game boring).

2.- Always compile the game as a standalone .exe file and not as installer. People don't want to install Jam games.

Good job!