Hey fantastic game! It's a beautiful combination of tower-defence and bullet-hell. I think this concept could go on to make an actual full on title, and you have developed an extremely solid base for it! Really just needs more levels and a few more features/enemies/towers etc... but just looking at what you guys did in 48 hours makes me think you could easily make a full-fledge indie game in about a month.
A few comments (though honestly the game is great as is!):
- Audio seemed a little low. Sounded good! But I had to turn my laptop pretty high up to hear it.
- Game seemed relatively easy, though it's better to have a game to easy than to hard! Seems like you can build several barricades for protection and then just run behind the enemies for cover when most of the bolts drop to retrieve them.
- There's also not a ton to do during the attack phase other than collect the bolts. Maybe some power ups or weapons that you could use would be nice.
- Not sure what the different colors of enemies mean? Are they stronger or just for variation? A tool-tip explaning what's special about them might be nice.
But yes the game is already in a very nice state, especially in the 48 hours you guys had to make it! Very polished and fun! You definitely deserve to be in the top 100 games!