sCATch 2: The Painter Cat

My full walkthrough video is here: Alternately, you can follow the solutions here:
Level 1
→
Level 2
→ ↑ → ←
Level 3
← ↓ ← ↑ ↓ ↑ ← ↓
Level 4
↓ ← ↑ → ← ↓ → ↑
Level 5
↑ → ↑ ← → ↓ ↑ ← ↓
Level 6
↓ → ↓ → ← ↑ ↓ → ↑ ← → ↓
Level 7
↓ → ← ↑ ↓ → ↑ ← ↑ → ↑
Level 8
↑ → ← → ↑ ← → ← ↓ → ↑ ↓ ← ↑
Level 9
↑ ← ↑ → ↓ ← ↑ → ← ↓ ↑ → ↓ ← → ↑ ← ↓ ←
Level 10
← ↓ → ↑ ← ↓ ↑ → ← ↓ ← ↑ ← ↓ → ↓ ↑ →
Level 11
→ ↑ ↓ → ← → ↑ ← ↑ ← → ↓ →
Level 12
→ ↓ ↑ ↓ → ↓ → ← ↑ → ↓ → ↑ → ← → ↓
Level 13
↓ ← ↓ → ↑ ← ↑ → ← → ↓ → ↑ ← → ↑
Level 14
↑ ← ↓ ↑ ↓ → ↑ → ↓ ↑ ↓ ← ↑ ←
Level 15
← ↓ ← ↑ ← ↓ → ↓ → ↑ ← → ← ↓ ← ↑
Level 16
↑
Level 17
↑ ↓ → ↑ → → ↓ ← ↑
Level 18
↑ ↓ ↑ → ↓ ↑ ↓ → ← ↓ ←
Level 19
← ↑ ↓ ↑ → → ← → ↓ ← → ← ↑ → ← ↑
Level 20
↑ → ↑ → → ↓ → ↓ ↓ → ← ↑ → ↑ ← →
Level 21
→ ↑ → ↓ ← → ↑ ← ↑ ↑ ← → ← ↓ ↑
Level 22
↓ ↓ ← ↑ ↑ → ↓ ↓ → ↑ ←
Level 23
↓ → ↓ ↓ ← ↑ → ↓ → ↑ → ↓ ↑ → ↓
Level 24
↑ ↑ ← ↓ ↑ ↑ ↑ ↑ → ↓ ↓ ↑ ← ↓ ↓
Level 25
↓ ← ↑ → ← ↓ ↑ ↓ → → ↓ → ← → ↓ ↑
Level 26
↑ ↓ ← ↑ ↑ → ↓ ↓ ↓ ← → ← ↑ ↓ ← ↑ ↓ → ← ↑ →
Level 27
→ → ↓ ← ↓ ↓ ← ↑ ↑ ← → ← ↑
Level 28
↑ ← ↓ ↑ → ← ↓ ← ← ↓ ← → ← ↑ → ↓ ↑ ↑
Level 29
↓ → ← ↓ → ↑ → ↓ ← → ↑ ← ↓ ↑ ←
Level 30
← ↓ ← ← ↑ ← ← ↑ ← ↓ → ← ↑ ↓
Level 31
↓ → ← → ↓ → ↑ ↓ → ↓ ↑ → ← → ↓
Level 32
↓ ← ↑ → ↑ ↓ ↑ → → ↑ ← → ↓ ↑ ← ↓ →
Level 33
→ → ← → ↓ ← ↑ ← ↓ ← ↓ → ↑ → ↓ →
Level 34
→ ↓ ← ↑ ← → → ↓ ← ↓
Level 35
↓ → ↓ ↑ ↓ ← ↑ ↑ ↑ ↑ ↓ → ← ↑ → ↓
Level 36
→ ↓ ↑ → ← ↑ → ↑ → ↓ ← ↑ ↑ ↓ ←
Level 37
← ↓ ↑ → → ↓ ↓ ← ← → → → ← ← ↓ → ← ↓ →
Level 38
→ ↓ ↑ ↓ ← ↑ → ↓ ← ↓ ↓ ↓ ← → ↑ ↑ ←
Level 39
← → ← ↑ ↑ ↓ → → ↑ ← ↑
Level 40
↑ → ↓ ← → ↓ ↓ ← ↑ → ← ↑ ↓ → ↑ ↑ → ↑ ← → ↑ ↓ ↑ ↓ →

To get the 50 mistakes achievement, load up level 2, and just go → ↑ ↓ ↑, and repeat until the achievement unlocks after 50 failures.