I don't actually know what the bars are supposed to represent, like you're holding the tulip up with a stick or something? Looks neat though.
Also, it's a pangram!
Cannot be modified, like a purely functional data structure
21A
Deadly premonition, say ("Deadly Premonition" is also the title of an absurd video game)
22A
One can spoil the whole bunch (also, the title of a Touhou track which spawned a meme where people would remake the animated music video in any medium they could)
23A
Airplane'd some vegetables into, perhaps
24A
President after JFK
27A
Prefix for plasm
28A
Getting some buds (this could refer to plants or beers apparently)
32A
"___ me in. ___ me innnnnnn!" — Eric Andre
35A
Place for remains
36A
Really cool-looking lamp type; Cloudflare uses a whole array of them for random number generation
37A
Thigh muscles, for short
40A
Mo. city (it has the Gateway Arch)
41A
Element used a lot in fiberglass production
42A
Not-yet-translated files, as in anime and manga
43A
Where Noah landed
45A
Aral, at one point (even Wikipedia uses "was" in the article)
46A
Atrophying (maybe drink some milk?)
50A
Coconut-and-egg jam popular in South East Asia (but maybe not as popular elsewhere, so I'll say that it backwards is one certain mammal)
54A
Plural ending for "tab"
55A
"I've seen crazier things"
56A
Gems that Sonic has to collect to activate his Infinity Gauntlet, I think; I haven't seen any Marvel movies and I last played Sonic like a decade ago
60A
Prefix meaning "Mars" (it's spelt almost like the corresponding Greek name)
61A
Approves or embargoes
63A
Turbulent waters
65A
North American Indigenous people, who live mostly in Canada
66A
Fr. ladies
67A
Educe, as a response
68A
Second of three in a Cartoon Network show
69A
Places where you might start hearing ominous chanting in Latin and find a disproportionate amount of healing items
Verticali
1D
Have an influence (on)
2D
Tooth covering
3D
Measurement of how much things reflect light; fresh snow has a really high value, which is why it's so darn bright in the mornings
4D
Placed down
5D
One would start to find less of this as you go to 12D regions (or maybe in 13D too I guess)
6D
The last letter of the alphabet extends pinky and drinks tea
7D
Sushi tuna
8D
Fail, as in a movie at the box-office
9D
Dalai ___
10D
Radiate, as charm
11D
"Improvise. ___. Overcome"
12D
Like climate south of the Arctic or north of Antarctica
13D
Dante's, uh, vacation destination in "Divine Comedy"
17D
Prepare to hit a triple bogey, maybe
20D
Tic-___-toe
24D
Most people born in August
25D
"Whew am I in a freezer or something?"
26D
What you're probably not doing correctly if you're sitting there shouting "You piece, why won't you fit in there!"
29D
MAD stuffs like a really big 8D
30D
___-Grain cereal bars (healthy-sounding name, I don't know if it actually is)
31D
Italian frozen desert (this is like the 5th entry that's cold-themed)
33D
Annual esports event for fighting games (it's where the video of Chun-Li's attacks being parried comes from)
34D
Bronze
36D
Fantasy novel by J. R. R. Tolkien inits.
37D
Codes that you can scan with your phone's camera
38D
Dubai's country abbr.
39D
Summoned an eldritch being from its slumber just so you could have a friend, say
41D
Sweethearts, in slang
44D
Chi ___, religious symbol that looks like a P with an X through it, but those are actually Greek letters
47D
Shout from a lottery winner
48D
"I ___! Get that limited edition NVIDIA RTX 3080TI for me!"
49D
Quintet in "A Christmas Carol" (quartet really, but I saw an adaptation of it as a kid and jeez they made Ebeneezer really ugly)
51D
Rainbow-shaped
52D
China's Sun ___-sen
53D
"I'll go out on ___ and say that I do like pineapple pizza." (gasps ensues)
56D
Top-left key, unless you got one of those really compact keyboards, in which case, I don't know what your layers are!
57D
Female horse
58D
"___ arigato, Mr. Roboto"
59D
Console for "Kirby Super Star"
60D
"You're such ___! Oink oink!"
62D
Sound made when you have water and 36A touch (at least, in Minecraft)