Hey, thanks for playing and giving us some good feedback :) There's lots of instances of bits of content that we didn't have time to add such as different enemy types, unique upgrades and more varied rooms. But a big aspect of the game that we had been planning to implement but ran out of time for was an actual way to win the game. This probably would have included a better procedural generation system that can put specific rooms in certain places which you need to visit and clear a number of to unlock a boss room. It probably would have taken us another 2 weeks to get all that made and working well, so we had to cut it and reduce the scope of the game to just an endless shooter.