Below are the tips of the selected levels.

?? LEVEL 1 | Conveyor

Best perk: Hurry Hurrikale Perk

Quite easy level, possible to complete both Bonus Objectives with very low-lvl plants.

Use Plant Food exclusively on Iceberg Lettuce to complete "freeze zombies" objective.

Use Hurrikale (from Hurry Hurrikale Perk) to pushback zombies to the right.

?? LEVEL 2 | Arena

Best perk: Bass Blast Perk

?? LEVEL 3 | Conveyor

Best perk: Bass Blast Perk

?? LEVEL 4 | Perk Grind

Best perk: Hyper Healing Perk (with Chard Guard)

Ideally, Shrinking Violet is the only instant-use plant to bring into this level.

Use Shine Vine for sun production.

Use Pokra as main attacker and for stalling zombies.

Use Boingsetta to chill and knockback plants.

All shrunken zombies from NMT will lose their special abilities.

?? LEVEL 5 | Conveyor

Best perk: Bass Blast Perk

Low-level Electric Peashooter cannot kill zombies without them passing the flower line.

Use plant food on Infi-nut to create a forced shield to block zombies.

Use Stallia as soon as he arrives at the conveyor.

?? ZOMBOSS | Zombot Tuskmaster 10,000 B.C. - No plant food setup!

Zombie level: Lvl 1 / 4 / 7

Zomboss health bar: 5 / 9 / 13

Seed slot: 7 / 6 / 5

Locked plant: Homing Thistle

Best perk: Bass Blast Perk

Sun production is optional because there are a lot of suns dropping from the sky.

No plant food is provide - Tile Turnip is useless.

Recommended to bring a fire plant to warm surrounding plants - Meteor Flower, Pyre Vine, Pepper-pult, etc.