Issues

General

colors are slightly different from psx (map differently?)
a few sfx are very loud and distorted (ex. warp sound, also when entering a bonus round)
in some instances, game transitions occur too early (ex. game immediately jumps to win level screen when player lands on a warp platform, without playing either of crash's 'win level' animation sequences; some death sequences are cut short)
main death sequence camera behavior is incorrect
title sequence background images become too bright in some instances
it is sometimes (but rarely) possible to jump in mid-air when beside walls
demo mode does not function correctly
attempting to enter any title state other than the map from the main menu ultimately results in the game entering an infinite loop and/or crashing
compiling with optimization flags causes the game to behave differently (aside from performance improvements)
tree change tracking implementation is broken

Per-level

Map

camera is incorrect
textures fail to load in some instances

N. Sanity Beach

Jungle Rollers

The Great Gate

Boulders

Upstream

Rolling Stones

falling pegs seem to be positioned slightly higher than Crash when Crash stands on them

Papu Papu

Hog Wild

player dies after respawning at a checkpoint
crash skips the 'look back at camera and then jump on hog' animation sequence that typically begins hog levels

Native Fortress

Up The Creek

Ripper Roo

Ripper Roo only makes a single jump before they disappear and restart their path

The Lost City

game crashes when attempting to kill lizards

Temple Ruins

approaching bats causes game to crash

Road To Nowhere

objects do not detect solid floor; any wumpa fruit/lives released from boxes seem to fall past the floor without being stopped

Boulder Dash

Whole Hog

Sunset Vista

same crashes as The Lost City, when attempting to kill lizards (note: RWaOC; corrupted animation eid?)

Koala Kong

TNT boxes fall through the floor
boulders launched by Koala Kong do not appear or are not thrown in the destined direction

Heavy Machinery

Cortex Power

going near a MafiC causes the game to crash

Generator Room

Toxic Waste

solid ceiling is not detected
game crashes when dying in certain zones

Pinstripe

gun bullets do not do any damage to Crash

The High Road

Slippery Climb

Lights Out

lights go out too abruptly when time is up

Fumbling in the Dark

Jaws of Darkness

spider or shadow rotation angle is incorrect
rotating pegs rotate way too fast

Castle Machinery

N. Brio

N. Brio never transitions from his initial state

The Lab

game crashes when dying in certain zones

The Great Hall

N. Cortex

some particles shot by Cortex are not visible?
only some of the particles shot by Cortex damage Crash

Stormy Ascent

potion vials thrown by lab asses are not visible