It's a shame you weren't able to get as much done as you'd hoped, sounds like it would have been an interesting game. I hope you'll find the time to develop it some more.

Quick thoughts

• Really needs a mouse sensitivity setting
• There really needs to be an in-game UI hint about how to insert the cartridge. I honestly restarted the game assuming I'd glitched it until I notice the instructions on game page.
• I feel it's a shame turning on console is in a UI menu, while other interactions are more immersive.
• Platformer
  • Need a ui hint about which keyboard button is the 'Start' one, it was missing from controller input hints.
  • The camera jittered as I moved horizontally (Perhaps a pixel camera issue?).
  • I didn't seem to be able to make the first jump in the 2nd stage without the "mushroom" power-up.
  • Killing enemies doesn't seem to consistently bounce me up.
  • The movement felt a bit off, like the jump seemed to floaty. If you haven't seen it, I recommend checking out GMTK's 'Platformer Toolkit' it's a great resource for improving platformer movement and game feel.

• House yard should have visible boundaries rather than just invisible walls, like a fence with closed gates
• Noticed the rain splashes were sometimes visible through wall.
• 'Hold esc to quit' should become visible faster. I tapped it and then assumed escape hadn't been implemented.