Very interesting concept that could be improved in some ways:
- Be able to walk around while on foot with either of the joysticks.
- Have the balloons cast shadows on their strings so they don't look oddly white all the way up to the top of the balloons.
- Be able to hold onto two balloons at the same time. Although this may make the game easier since technically your weight would be halved per balloon, so each balloon could each last twice as long, the critical issue is to avoid accidental grabs:
- Be holding onto balloon X.
- Try to grab balloon Y.
- You think you didn't grab balloon Y (didn't hear the grab sound due to the environmental ambience), so you let go of the controller button and try again.
- In step 2, you actually did already grab balloon Y, so when you let go in step 3, that was actually your lifeline.
- Die because it wasn't clear enough that you had grabbed it, even though you were still holding down the trigger button for the previous balloon.
So I guess it's either hold-two-balloons or make-grabs-more-obvious, like with a sound effect, some sort of flash animation, text, all of the above, etc.