Wow! This is probably my favourite game of this jam so far. I've tried close to 100 so far. Congratulations.
The graphics and sound design has a bit of an Undertale feel. The gameplay is hard, but it is tastefully so. A lot of 'hard' games punish the player unfairly. But not once when I died in Retro Rampage did I feel like I was cheated by the game. That is hard to get right and I think you did well getting that balanced.
I also liked all the different powerups. It was great fun plowing through the map trying to find more powerups.
Some minor feedback:
- Try playing with the camera so that it is biased towards the direction the character is moving.
- Try experimenting with some slight easing of the player's rotation.
- Add some sort of laser sight or similar to the direction the player is facing. This is something that we added in our game last minute because we found it sometimes difficult to pin point at a glance which way the player is facing since you have to use the mouse to aim the player.
- Add a pause between the levels.
- Consider adding a mechanic which slows down the player's movement temporarily so that it is easier to aim when there are a lot of enemies around. Sometimes I feel like fighting, but am forced to flee due to the game's constant shoot to move mechanic.
Overall great stuff!