Thanks!
This is great insight. This is kind of a hardcore rocket and physics simulator masked with a lightweight art style. I'm realizing more that the mechanics are a little bit unforgiving, especially when first starting and this might make people not progress further or become better at it. So yes, I think I'll make the easy mode have free rockets instead of offering the 500cr right upfront. So basically one mode is "permadeath" the other is lightweight/ you don't lose progression style.
Anyway, the idea is that yes, after a few missions you have enough credits to feel like you have a lifeline and you'll survive even if you mess up. Credits are an infinite resource, especially after you figure out the first delivery/tourism/satellite deployment missions, then they will always be similar and if you mess up you can just do one or two more to get a couple more upgrades and 50 extra credits as insurance.
I've updated the game now with the new casual mode. If you want to try it again go for it =)