It's a bit hypocritical to tell someone to "just" review the level... Why not just review it yourself? (Unless you wanted to review Level 4, of course, but you're not ALL going to review it...)
Crisfn01 - Level 3: Be careful!
40 Lems
50% to save
RR: 15
Time: 2 minutes
Skills: 2 bombers, 3 blockers, 7 builders
Good: Looks tough at first glance...
Bad: The level is completely trivial. The only solution that seems possible is made irrelevant by the hidden exit that you will undoubtedly come across in your first serious play.