Thank you for taking your time!
The Fire Pick-Up gives you invulnerability against Ice Spikes for 8 Seconds. So if it gets really tight, it might help to pick those up :)
Oh that makes sense. Is there an indication that your are invulnerable? I'll have to look again. I didn't notice anything but then again I was also not picking them up often :).
There is, it is slightly bugged however. The slime changes color, but only if it is not tethered at the moment.
