Another good "simple but great idea".
Gameplay:
- Here lies everything. You have three simple controls (move, shoot, explode) and one mecanics: grownig. Mechanics that also you enemy can use, creating more and more challage. You have to think well when to shoot/explode, before you have no more space to move.
If you wanted to recreate the feeling of an old game, you did it very well.
Graphics:
- Perfect for this game. Maybe a little bit minimal, but this is only personal taste.
Music:
- One of the few time where SFXs can do the job alone. Usually I like to hear something on the background, but here would take away the retro-taste of this game.
Relevance to the Game Jam's Theme:
- Perfectly on theme. And not only that: you were able to use in a very good way the small amount of time given to you. Four days are still four days.
GG, you're on a good path.